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->''"God is a mean kid sitting on an anthill with a magnifying glass, and I'm the ant."''
-->-- '''Bruce''', ''Film/BruceAlmighty''

Someone uses a magnifying glass or similar optical instrument to concentrate sunlight to kill, burn, or melt something. This may take a few different forms.

Children at play may experiment with using setting fires or killing small insects with a magnifying glass. At times this may be used to demonstrate that the child is an EnfantTerrible, or (in works written from the perspective of the insect) that HumansAreCthulhu. On the other hand, sometimes children who do this are just portrayed as scientifically curious.

In some cases, a larger lens may be used as an ImprovisedWeapon. Many attempts at this -- both fictional and real -- are inspired by the story that the ancient Greek scientist and engineer Archimedes used this sort of contrivance to destroy a Roman fleet during the 214-212 BCE Siege of Syracuse. Supposedly, he focused the rays of the sun using an array of polished shields, mirrors, or lenses. (Sadly, ''Series/MythBusters'' tested this example of the trope -- ''three times'' -- and found it less-than-effective.)

Finally, people stranded in the wilderness may use magnifying glasses in order to [[MacGyvering set the fire they need to survive]]. Which is possible, [[HardToLightFire although often difficult]].

This trope may seem fairly modern but it's in fact OlderThanFeudalism. In Aristophanes' ancient Greek comedy ''Theatre/TheClouds'', the gods use a set of mirrors or lenses to ignite the Olympic Torch (a smaller device traditionally lights the torch for the running in modern days).

Also this is TruthInTelevision. It works, but not as quickly as usually depicted.

Related to ThePowerOfTheSun and SundialWaypoint. Not to be confused with a KillSat, which uses a remote controlled satellite and may or may not actually use sunlight.



[[folder:Anime & Manga]]
* Used by [[PlayingWithFire Nova Shenron]] in ''Anime/DragonBallGT''. He summons a giant lens and use it to fire an extremely hot sunbeam.
* In ''LightNovel/BodaciousSpacePirates'', the ''Odette II'' is being fired upon by a pirate ship using optical targeting. Marika reconfigures the solar sails to reflect Tau Ceti's sunlight directly onto the pirate ship, blinding their spotter and heating the hull. She stops just short of melting the ship.
* ''Anime/MobileSuitGundam'' has the Solar System, a superweapon wielded by TheFederation that is a scaled-up version of the old Archimedes "Death Ray". In this case it's somewhat more plausible, because the array consists of '''four million''' mirrors, each the size of a small building, and they're all aimed by computers. ''Anime/MobileSuitGundam0083StardustMemory' introduces the Solar System II, which is much more efficient thanks to better materials and targeting software, meaning it can achieve the same destructive power with only 408,000 mirrors.
* The [[MacGuffin Red Stone of Aja]] from ''Manga/JojosBizarreAdventure'' has this effect. Putting it upto a light source will cause it to reflect the light a [[AMillionIsAStatistic million]] times and emit it out the opposite side as laser. This can also be used to power up the [[ArtifactOfDoom Stone Mask]] to turn a [[OurVampiresAreDifferent Pillar Man]] into the UltimateLifeform. The Stone is also able to amplify the Ripple, since it's basically solar energy.
** Caeser Zeppeli uses this trope with bubbles to reflect light from outside a castle to the inside at Wamuu.
** An unintentional version happens in ''Diamond is Unbreakable'', where Rohan leaves a magnifying glass on a newspaper and ends up starting a fire that does quite a bit of damage to his house. He ends up blaming Josuke for it because they were gambling at the time and Rohan was so fixated on [[NotCheatingUnlessYouGetCaught finding out how Josuke was cheating]] that he didn't notice the fire until a third party pointed it out.
* A filler villain in ''Anime/{{Naruto}}'' had the ability to create a giant lens to fry people with.
* ''Manga/{{Nichijou}}''; in one scene, Mai and Mio ask Yuuko if they can borrow her eraser. Yuuko has them guess which hand she has the eraser in, and after a few missteps Mai pulls out a magnifying glass to burn the back of Yuuko's hand, which she promptly declares as cheating.

* Creator/BillEngvall talks about what a great day it was when you discovered you could do this as a kid ("You got to be God!"). Then he goes on to talk about when he was doing this and saw an ant on his arm...
-->'''Bill Engvall:''' Let me tell you something: you burn your arm with a magnifying glass, you're on your own. You can't even tell your mom, because she gives that face like, "Oh...he ''is'' that stupid."

[[folder:Comic Books]]
* ComicBook/AdamStrange of the Franchise/DCUniverse fought one of these on a gigantic scale as a MonsterOfTheWeek in his ''Strange Adventures'' appearances. He does so again in ''WesternAnimation/BatmanTheBraveAndTheBold'' but with Batman and Aquaman's help.
* In one old (1960s/1970s) ''ComicBook/GreenLantern'' comic, the villain used a giant flying magnifying glass as a weapon to burn his opponents. He used time travel to acquire it.
* In the ''Franchise/{{Tintin}}'' book ''Prisoners of the Sun'', that's how the Incas plan to light the fire that will burn the protagonists at the stake.
* When Lobo got ''ComicBook/TheMask'', he went on a galaxy-shaking rampage of random violence, at one point doing this to people of some unfortunate planet.
* In one issue of ''ComicBook/MarvelAdventures SpiderMan'', Doctor Doom builds a flying ring base whose center is actually a giant magnifying glass. However, he doesn't unleash it at once, instead opening its shutters slowly and making everyone suffer from increased heat. Spidey's able to stop him, though.
* This is the supervillian's plan, coupled with a reagent that reacts to filtered light, in the Franchise/{{Batman}} comic ''Messiah of the Crimson Sun''.
* The early ''{{ComicBook/Thorgal}}'' story "The Fall of Brek Zarith" has the current lord of the titular fortress destroy half an invading Viking fleet with Archimedes-inspired mirrors.
* In a ''{{ComicBook/Superman}}'' story, Superman is feeling sick and uses giant magnifying glasses to focus the suns rays onto him. Since he's powered by the sun, it gives him a needed boost of energy.

[[folder:Film - Animated]]
* In ''WesternAnimation/ToyStory'', Sid burns Woody's forehead with a magnifying glass while "interrogating" him. It serves as a ChekhovsGun, [[spoiler:as it gives Woody the idea of using Buzz's helmet to light the rocket that takes them back to Andy]].
* ''WesternAnimation/{{Antz}}''. Used for an ''Film/IndependenceDay'' spoof when a mysterious round object floats overhead ("It's beautiful!"), then a deathray-like beam shoots down causing the insects to burst into flames. Turns out the anthill is located in a public park where a kid is using a magnifying glass.
* In ''WesternAnimation/IceAge4ContinentalDrift'', Sid's little brother Marshall uses a piece of clear ice in this manner to burn an ant hill. We then pull back to see Sid's Granny doing the same thing to Marshall's head.

[[folder:Films - Live Action]]
* ''Film/DieAnotherDay's'' KillSat was essentially this, being one large mirror with a center focusing array to concentrate the light into a single, extremely hot beam.
* in ''Film/AlvinAndTheChipmunks:Chipwrecked'', To start a campfire, Simon demonstrates this by using his glasses as a magnifying glass to concentrate the energy from the sun. When Jeanette comments on it being "impressive", Simon, distracted, redirects the beam to ''his foot!''
-->'''Simon''': HOT! HOT! HOT! ''(limps around the beach and jumps into the ocean, then sighs in relief)'' Ah...that's better.
* The Archimedes Death Ray variant of this trope is shown in ''Film/{{Cabiria}}'', starting with a scene where Archimedes experiments with mirrors in his lab, followed by a big action setpiece in which his mirrors set fire to the Roman fleet.
* In ''Film/GoodnightMommy'', Elias is shown burning the wall with a magnifying glass. Later, [[spoiler:he uses it to torture the mother]].

* Using a magnifying glass to kill ants is listed as one of the misdeeds of Bruno the SpoiledBrat in ''Literature/TheWitches''.
* The large, weaponized variety is used by Tavi in ''[[Literature/CodexAlera Cursor's Fury]]'', in one of many [[CrowningMomentOfAwesome CMOAs]] for him. Earlier, he starts a fire this way to disguise the fact that he has no firecrafting himself.
* In ''Literature/OneHundredYearsOfSolitude'', gypsies put a pile of dry hay in the middle of the street and set it on fire with a gigantic magnifying glass. This makes José Arcadio Buendía think that it can be used as as a weapon of war.
* Piggy's glasses are used to start fires in ''Literature/LordOfTheFlies''. [[WorldOfSymbolism Only farsighted lenses can do that, and Piggy is one of the few boys who look past the moment]].
* Mentioned in ''Literature/TheDresdenFiles'' in Changes, with rays of sunlight hot enough to melt metal.
* Creator/JulesVerne was big on this.
** Dr. Clawbonnie used a lens made of ice to start a fire in ''Captain Hatteras''.
** Cyrus Smith [=McGuyvered=] a water-filled lens from two watch glasses in ''Literature/TheMysteriousIsland'', as the castaways initially had no other means of starting the fire.
* In ''Discworld/SmallGods'', the Omnian fleet that attacks Ephebe is set ablaze by the rays from a massive mirror in a tower in the harbor. This is a direct reference to the ancient legend of Archimedes's "heat ray" in the siege of Syracuse.
* Alice, being a specialist in light magic, uses a spell to this effect in ''The Magicians''. It's not very practical however--she was using it not long before sunset, and, after nothing the "lens" was a mile long, it still took her quite a long time just to burn through a door.
* Jenna from ''Literature/SeptimusHeap'' used a magnifying glass she had stolen earlier to reflect the light onto and burn Simon's face. While being on a flying dragon.
* Occurs in the StarWars novel ''[[Literature/XWingSeries Wedge's Gamble]]''. As part of a lunatic plan to take down the city-planet Coruscant's orbital shields, thus rendering it vulnerable to invasion, the Rogues require a massive thunderstorm (to take out the power grid). To get one, they settle on vaporizing all the water in a reservoir by redirecting and refocusing an orbital satellite. Used as intended, the satellite focuses sunlight on portions of Imperial City to make the temperature more livable. Used as unintended, it vaporizes the target -- reservoir and all -- in a matter of seconds.
* Used for a BaitAndSwitch in the {{drabble}} ''Research Project 12B'' by Richard Cassidy in which an apparent MadScientist TestedOnHumans plot turns out to be a sadistic kid with a magnifying glass frying ants.
* A pair of lenses from a telescope are used by the castaways to start a fire in ''Literature/TheCoralIsland''.
* In the Creator/StephenKing short story ''Mile 81'', Pete Simmons uses this to set fire to the human eating monster car, effectively driving it off.
* In ''Literature/CodexAlera'', a group of Knight Aeris (people who can manipulate air for flight or as a lens, among other things), under orders of main character Tavi, work together to create a ''quarter-mile wide'' magnifying glass that is basically a solar-powered DeathRay.

[[folder:Live Action TV]]
* In an episode of the ''Series/{{Shazam}}'' live-action TV series, Captain Marvel creates a lens out of sand by rubbing the sand very fast, in order to focus the sun on something.
* Most wilderness-survival shows, like ''Series/DualSurvival'' or ''Series/{{Survivorman}}'', will demonstrate this method of fire-starting at least once.
* ''Series/DoctorWho'':
** Donna uses an actual magnifying glass in series 4, [[Recap/DoctorWhoS30E7TheUnicornAndTheWasp "The Unicorn and the Wasp"]], to daze the Vespiform.
** Amy in [[Recap/DoctorWhoS31E6TheVampiresOfVenice "The Vampires of Venice"]], when she uses her make-up mirror to kill one of the alien fish vampire things while pre-[[TookALevelInBadass took several thousand levels in Badass]] Rory distracts it.
* ''Series/{{Batman}}'': Catwoman once put Batman and Robin in a DeathTrap that worked this way.
* An episode of ''Film/TheLittleRascals'' involved Porky and Buckwheat having a bunch of firecrackers. Spanky and Alfalfa "confiscated" them by posing as a G-Man. Spanky tried to set off the firecrackers with a magnifying glass, but the school bell rang. Alfalfa took the firecrackers and stuck them in his back pocket - and Porky picked up the magnifying glass. During class, Alfalfa is called on to recite "The Charge of the Light Brigade",and this is when Porky uses the magnifying glass to set off the firecrackers.
* Lil' Bat tries to fry some ants this way in a cartoon segment of ''Series/TheAquabatsSuperShow''. The ants retaliate by eating him.
* ''Series/ThirdRockFromTheSun'':
-->'''Dick''': This afternoon I tried to borrow Mary's magnifying glass. You know, to burn some ants.\\
'''Sally''': Of course, go on.\\
'''Dick''': So anyway, she's like, "No, you'll break it!" And I'm all, "I will not!" And she's like, "It's mine, you can't have it!" So we had this huge fight. Finally, she let me borrow it... when she wasn't looking.\\
'''Sally''': Let me guess, you broke it.\\
'''Dick''': Yes! A particularly large queen burst into flames and I got scared and dropped it on the sidewalk.
* As noted above, ''Series/{{Mythbusters}}'' tested the Archimedes Death Ray three times (2004, 2006, and 2010) and all three times busted the myth, finding it impossible to focus light from shore mirrors well enough to set fire to a wooden ship. (Aside from the giant-lens-as-DeathRay myth, the show also tested whether it's possible to light fires with lenses made out of shaped ice or the polished bottoms of soda cans.)
* In the last scene of the two part season 8 ''Series/{{CSINY}}'' opener, the perp, a serial arsonist/killer does a version of this with his glasses and a book he was reading.
* In ''Series/OneThousandWaysToDie'', a jerk builds a giant version of one and uses it to destroy objects for his own amusement and he also tricks people into sticking their hands into the beam. He meets his end when he tries to cook a can of beans with it. The can explodes in his face, causing him to thrash around until he falls in the path of the beam, which quickly burns through his head.

* In the Music/BradPaisley song "Anything Like Me", the narrator imagines what his son will be like in the future, and says what said son will do if he's anything like his father. Among the activities listed is trying to melt a Tonka truck with a magnifying glass.
* The video for Music/{{Soundgarden}}'s "Black Hole Sun" features a couple of little boys frying bugs this way, only to have the tables turned on them.

[[folder:Newspaper Comics]]
* A ''ComicStrip/CalvinAndHobbes'' strip had Stupendous Man use a giant magnifying glass from an observatory telescope in order to fry Calvin's school off the map. Of course, since it was all in Calvin's imagination, his Mom doesn't believe him when he says that the school got fried, and has him do his math homework.
* ''ComicStrip/FoxTrot'': One strip has Jason seemingly roasting ants with a magnifying glass and them eating them to gross Paige out. It turns out they were really just raisins.
* ''ComicStrip/TheFarSide'': Two ants are on their hill, one of them saying "Now ''I'm'' starting to feel kinda warm!" while looming over them is the shadow of a kid with a magnifying glass.

[[folder:Tabletop Games]]
* In ''TabletopGame/MageTheAscension'', one of the marauders (insane chaos mages) was rumoured to use a magnifying glass from a cereal box as a magic tool for his energy attacks.
* One ''TabletopGame/DungeonsAndDragons'' supplement of amusing traps included a breastplate with a massive gem in the center that radiated magic. It did nothing while in the dungeon, but upon being struck by sunlight, it immediately focused an intense beam of concentrated light into the chest of the wearer, causing massive amounts of damage.
** The ''TabletopGame/DungeonsAndDragons 3E'' adventure "The Eye of the Sun" centers around a magical artifact that acts as one of these. It's used by a cult of lizardfolk to burn a village down.
* The ''TabletopGame/MutantsAndMasterminds'' adventure "High Noon", part of the Lame Mage Evil Genius adventures, Dr. Null [[spoiler:post-humously]] launches a doomsday device that deploys a cloud of small nanotechnology crystals that float around and focus beams of indiscriminate destruction from the sun's rays to destroy major cities.
* ''TabletopGame/{{Warhammer}}'' has two war engines based on the focusing of solar magic with lenses and crystals. The Empire has the Luminark of Hysh, which uses an array of eight giant lenses to focus a mote of light magic into the ravenously destructive Solheim's Bolt of Illumination spell. The Lizardmen, meanwhile, have the Solar Engine - a giant faceted crystal held in a retaining harness that produces a similar burning death ray effect.

[[folder:Video Games]]
* Invoked in ''VideoGame/ShadowOfTheComet'' for a SolveTheSoupCans puzzle. Basically, the hero is stuck in a lighthouse, and cultists are bashing at the door. Here, he finds a pair of wings and a candle. Using the magnifying glass in the inventory, he melts the candle to add wax to the wings. [[DieOrFly Guess what you do with the wings.]]
* In the text adventure ''Dragonsworld'', Amsel signals an airship by using his magnifying glass to ignite a pile of leaves.
* In ''VideoGame/{{Crossfire}}'', "magnifying glass" is a somewhat useful (increases Dexterity when held) JokeItem -- a weapon with minimum damage and [[WeaponOfXSlaying ant slaying]] property. Works even underground.
* In RTS ''VideoGame/ArmyMen'' games, this appears as a super weapon in some games. Due to the fact that all units are either little plastic men or (rarely) bugs, it works fairly well.
* In the ''Rise of Rome'' expansion to ''VideoGame/{{Age of Empires|I}}'', there is a scenario that places you in control of the ancient Romans invading the Greek city of Syracuse. Surrounding the city's seacoast are several towers that shoot beams of light that set your ships on fire, referring to Archimedes and his heat ray.
* Appears as one of Penny's microgames in ''VideoGame/WarioWare: Smooth Moves''. (BURN!)
* In 'VideoGame/TheIncredibleMachine'' magnifying glasses are used to set things on fire. With a flashlight.
* The lens from a broken telescope provides one of several ways for Mina to start fires in ''VideoGame/{{Return to Mysterious Island}}''.
* In ''VideoGame/{{Gruntz}}'', any Gruntz using the magnifying glass spy kit Toolz will use this as their attack.
* The [[PunnyName Magnifying Grass]] from ''VideoGame/PlantsVsZombies 2''. It [[CastFromMoney uses your sun]] to fire very powerful shots of light, and its Plant Food upgrade causes it to fire a concentrated beam that deals heavy damage over time and burns up zombies it kills.
* The level 11 quest in ''VideoGame/KingdomOfLoathing'' has you [[DismantledMacguffin assembling the Staff of Ed]] and bringing it to a small pyramid in the desert with a scale model of the Seaside Town in it, under the impression that it will be a SundialWaypoint and show you where the Holy MacGuffin is buried. What actually happens, though, is that the focused sunbeam sets the model on fire, revealing a trapdoor -- the MacGuffin is ''inside'' the pyramid. The "[[AnotherSideAnotherStory Actually Ed the Undying]]" challenge path reveals that it's made of ''matchheads''.
* One level in ''VideoGame/AgeOfEmpires'' has Archimedes design mirror towers that are represented in-game as shooting ''lasers''.

[[folder:Web Original]]
* After Creator/GeorgeLucas reveals his plan to destroy all the original VHS copies of ''Franchise/StarWars'' in ''WebVideo/HalfInTheBag'', a montage of him doing just that is shown, with one part featuring this.

[[folder:Western Animation]]
* In an ''WesternAnimation/AdventureTime'' AdBumper, Ice King is trying to burn a giant ant. He then aims the magnifying glass at Finn, yelling, "You want some of this?"
* ''WesternAnimation/TheSimpsons'':
** "Marge vs. the Monorail": After it all, we hear a voiceover from Marge.
-->And that was the only folly the people of Springfield ever embarked upon. Except for the Popsicle stick skyscraper. And the 50-foot magnifying glass. ''[the sun focused through the magnifying glass sets the Popsicle stick skyscraper on fire]'' And that escalator to nowhere.
** [[http://www.tu-pc.com/fondos/media/3206.jpg Bart burning a toy soldier]]
* ''WesternAnimation/TheTick'' had an inverted version of this, with evil giant ants that planned to deliver {{Karmic Death}}s to all of humanity via one gigantic magnifying glass.
* In ''WesternAnimation/{{Futurama}}'', Prof. Wernstrom's plan to stop global warming is a giant mirror that reflects excess light away from the Earth. Then a small piece of space debris knocks it askew, and a beam of concentrated light slices through the city.
* In ''WesternAnimation/ThePerilsOfPenelopePitstop'' episode "Hair-Raising Harness Race", while Penelope is trapped in a shed filled with explosives, the Hooded Claw has the Ant Hill Mob bound with a rope and hanging from a tree limb. A magnifying glass is set so that the sun's rays will burn the rope and send the mob plummeting into a deep chasm.
* In a ''WesternAnimation/RobotChicken'' sketch a boy has his magnifying glass out to burn ants and laughs. God then hits him with a lightning bolt and laughs.
* ''WesternAnimation/NedsNewt'': "I really shouldn't be wearing my magnifying-glass-hat now, should I?"
* The title character of ''WesternAnimation/JohnnyBravo'' does this in one episode, however, his real goal was to use the light from the ants to burn a hole in the sun.
* 'The Inspector' episode 'Napoleon Blown-Aparte' - which detonates a beaumb under a sun-bathing Commissioner.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'' pilot has Mandy melting Billy's toys with a magnifying glass.
* An episode of ''WesternAnimation/InspectorGadget'' featured a computer-controlled space station with a giant magnifying lens which was used as a weapon until the Hal-like computer which was in control decided to destroy the lens to prevent it from being used for evil.
* In ''WesternAnimation/AdventuresOfTheGummiBears'', one of [[LostTechnology the ancient inventions built by their ancestors]] was [[EveryoneKnowsMorse a signal machine]] called the Gummiscope. While the Gummis tried to use to contact the Great Gummis overseas, Igthorn intended to use it to conqueror Dunwyn. Knowing that [[NoManShouldHaveThisPower the scope was too powerful for anyone to be in control of]], the Gummis destroy it by tearing out its supports with a flood.
* In one ''WesternAnimation/OggyAndTheCockroaches'' episode, the roaches attempt to toast Oggy with one, except that in lieu of a magnifying glass they use a bunch of solar panels (which Oggy installed) as a mirror.
* ''WesternAnimation/TheNewAdventuresOfSuperman'': In "Seeds of Disaster", Super uses the lens from an observatory telescope to focus the sun's rays to incinerate the alien seed pods.
* In ''WesternAnimation/TheSmurfs'' episode "The Smurf Fire Brigade", Papa Smurf accidentally leaves his magnifying glass on the table outside before going into his house to take a nap. The magnifying glass focuses the sun's rays to start burning a spot onto the table until eventually the whole top of the table catches on fire. Lazy smells smoke and realizes he's in a dangerous spot, so he crawls out and yells fire, catching the attention of Papa Smurf and all the other Smurfs. Quickly a Smurf brings a bucket of water to the table to put out the fire, making all the Smurfs cheer.

[[folder:Real Life]]
* One of the ideas of the [[UsefulNotes/ColdWar "Strategic Defense Initiative"]] program was to combine orbital relay mirrors and directed-energy weapons into a KillSat effect similar to Archimedes' legendary mirrors, but much bigger.
* During [[TheCavalierYears the late 1770s]], Antoine Lavoisier[[note]]better known to modern public for chemistry work[[/note]] used a large glass lens (filled with alcohol for better refraction) to melt iron and attempt to melt ''platinum'' at short range. With some bit of improvement, UsefulNotes/TheNapoleonicWars might have been fought with laser-like solar guns - if some [[ForWantOfANail revolutionaries hadn't executed Lavoisier]] under the charge of treason.
* This is roughly how Concentrated Solar Power systems work: use mirrors to focus a lot of sunlight into a small area, use the resulting heat/high temperatures to generate electricity.
* One of ThoseWackyNazis' insane wunderwaffen projects was a contrivance known as the Sonnengehwer ("Sun Gun"), a [[KillSat gigantic orbital reflector array]] made of metallic sodium that would be used to incinerate enemy cities. Obviously, it never got off the ground.
* In 2013, a London building's curved exterior backfired when it turned out that [[http://www.cnn.com/2013/09/03/world/europe/uk-london-building-melts-car/index.html sunlight reflected off the curved side could concentrate with enough heat]] to warp the metal of cars parked on the street.