History Main / SundialWaypoint

21st May '18 2:16:37 AM StFan
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[[folder:Films -- Animated]]

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[[folder:Films -- Animated]]Animation]]



* In ''Film/RaidersOfTheLostArk'', the Staff of Ra must be placed in the Map Room at the right time of day in order for it to throw light upon the site of the Well of Souls.
* One clue in ''Film/NationalTreasure'' requires observing the shadow of a particular landmark at the right time of day. The filmmakers naturally forgot that the sun's exact position would also depend on the day of the year.
** Technically, the shadow would point to the right ''wall'' around that time of day regardless of the time of year. The fact that it was pointing at the exact ''brick'' is artistic license.

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* In ''Film/RaidersOfTheLostArk'', the Staff of Ra must be placed in the Map Room at the right time of day in order for it to throw light upon the site of the Well of Souls.
Souls. The villains have a staff of an incorrect length, so they are busy searching at the wrong place.
* One clue in ''Film/NationalTreasure'' requires observing the shadow of a particular landmark at the right time of day. The filmmakers naturally forgot that the sun's exact position would also depend on the day of the year.
**
year. Technically, the shadow would point to the right ''wall'' around that time of day regardless of the time of year. The fact that it was pointing at the exact ''brick'' is artistic license.



[[folder: Literature]]

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[[folder: Literature]][[folder:Literature]]



[[folder: LiveActionTelevision]]

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[[folder: LiveActionTelevision]][[folder:Live-Action TV]]



* They tested this on ''Series/{{Mythbusters}}'' and found that it works for a few minutes at most (see the RealLife examples).

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* They tested this on ''Series/{{Mythbusters}}'' ''Series/MythBusters'' and found that it works for a few minutes at most (see the RealLife examples).



[[folder: TabletopGames]]

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[[folder: TabletopGames]][[folder:Tabletop Games]]



[[folder:{{Toys}}]]

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[[folder:{{Toys}}]][[folder:Toys]]



[[folder: WesternAnimation]]
* Happens twice in ''WesternAnimation/AvatarTheLastAirbender'':
** Aang's first real communication with [[{{Reincarnation}} Roku]] could only happen on the winter solstice, which was indicated by a beam of sunlight shining on the forehead of Roku's statue.
** A straighter use of this trope is the door to the Sun Warrior temple. It would only open on a solstice, when the sun, focused through a lens, struck a stone on top of the door frame. Aang and [[spoiler:Zuko]] were able to cheat by reflecting the focused light beam onto the stone, rather than waiting for the right day of the year.
--->'''Aang:''' [[GettingCrapPastTheRadar Monkey-feathers]]! The solstice again?
* Used in ''WesternAnimation/ScoobyDooCampScare'', to find a 1920s gangster's hidden loot.
* Parodied in ''WesternAnimation/FamilyGuy''. When Peter has to dig his old black book out of the attic, he has to set up a staff and crystal to focus the light and open a secret door.
* ''WesternAnimation/AlfredJKwak'': In the Egypt episodes, the secret entry point to the Pharaoh's throne room in the pyramid is only visible at high noon when a mirror reflects the light.
* Inverted on ''WesternAnimation/NatureCat'', in which the shadow of Hal's doghouse is used by the four friends to determine the time when a visiting squirrel will return. They already know ''where'' the shadow needs to appear from Daisy's photo, just not ''when'' it will get to the designated spot.
[[/folder]]

[[folder: VideoGames]]
* In the video game ''VideoGame/{{Scratches}}'', the tip of the tower's shadow indicates the location of [[spoiler: Mrs. Blackwood's grave]], although it doesn't show up clearly enough for you to use this clue until the weather clears up.

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[[folder: WesternAnimation]]
[[folder:Video Games]]
* Happens twice in ''WesternAnimation/AvatarTheLastAirbender'':
''VideoGame/{{Scratches}}'':
** Aang's first real communication with [[{{Reincarnation}} Roku]] could only happen on the winter solstice, which was indicated by a beam of sunlight shining on the forehead of Roku's statue.
** A straighter use of this trope is the door to the Sun Warrior temple. It would only open on a solstice, when the sun, focused through a lens, struck a stone on top of the door frame. Aang and [[spoiler:Zuko]] were able to cheat by reflecting the focused light beam onto the stone, rather than waiting for the right day of the year.
--->'''Aang:''' [[GettingCrapPastTheRadar Monkey-feathers]]!
The solstice again?
* Used in ''WesternAnimation/ScoobyDooCampScare'', to find a 1920s gangster's hidden loot.
* Parodied in ''WesternAnimation/FamilyGuy''. When Peter has to dig his old black book out of the attic, he has to set up a staff and crystal to focus the light and open a secret door.
* ''WesternAnimation/AlfredJKwak'': In the Egypt episodes, the secret entry point to the Pharaoh's throne room in the pyramid is only visible at high noon when a mirror reflects the light.
* Inverted on ''WesternAnimation/NatureCat'', in which the shadow of Hal's doghouse is used by the four friends to determine the time when a visiting squirrel will return. They already know ''where'' the shadow needs to appear from Daisy's photo, just not ''when'' it will get to the designated spot.
[[/folder]]

[[folder: VideoGames]]
* In the video game ''VideoGame/{{Scratches}}'', the
tip of the tower's shadow indicates the location of [[spoiler: Mrs. Blackwood's grave]], although it doesn't show up clearly enough for you to use this clue until the weather clears up.



[[folder: RealLife]]

to:

[[folder: RealLife]][[folder:Western Animation]]
* Happens twice in ''WesternAnimation/AvatarTheLastAirbender'':
** Aang's first real communication with [[{{Reincarnation}} Roku]] could only happen on the winter solstice, which was indicated by a beam of sunlight shining on the forehead of Roku's statue.
** A straighter use of this trope is the door to the Sun Warrior temple. It would only open on a solstice, when the sun, focused through a lens, struck a stone on top of the door frame. Aang and [[spoiler:Zuko]] were able to cheat by reflecting the focused light beam onto the stone, rather than waiting for the right day of the year.
--->'''Aang:''' [[GettingCrapPastTheRadar Monkey-feathers]]! The solstice again?
* Used in ''WesternAnimation/ScoobyDooCampScare'', to find a 1920s gangster's hidden loot.
* Parodied in ''WesternAnimation/FamilyGuy''. When Peter has to dig his old black book out of the attic, he has to set up a staff and crystal to focus the light and open a secret door.
* ''WesternAnimation/AlfredJKwak'': In the Egypt episodes, the secret entry point to the Pharaoh's throne room in the pyramid is only visible at high noon when a mirror reflects the light.
* Inverted on ''WesternAnimation/NatureCat'', in which the shadow of Hal's doghouse is used by the four friends to determine the time when a visiting squirrel will return. They already know ''where'' the shadow needs to appear from Daisy's photo, just not ''when'' it will get to the designated spot.
[[/folder]]

[[folder:Real Life]]



* [[http://longnow.org/clock/ The Clock of the Long Now]], a mechanical clock designed to last 10,000 years without any human intervention, uses this to keep itself synchronized with the actual time. Every day at noon, the sun's light is focused through a prism[[labelnote:*]]A prism is used because it can redirect light coming from different directions into the same beam, thus allowing it to compensate for the changing seasons.[[/labelnote]], which heats a piece of metal. As the metal expands, it triggers a mechanism which causes the clock to run faster if it's behind, and slower if it's ahead.
** This only works to count days, rather than actual elapsed time, because the rotation rate of the Earth is not constant. It happens that the biggest source of error in the Clock's timekeeping (about 10 parts per million) is climate change potentially melting the ice caps, which could make the length of the day up to 1 second longer.

to:

* [[http://longnow.org/clock/ The Clock of the Long Now]], a mechanical clock designed to last 10,000 years without any human intervention, uses this to keep itself synchronized with the actual time. Every day at noon, the sun's light is focused through a prism[[labelnote:*]]A prism is used because it can redirect light coming from different directions into the same beam, thus allowing it to compensate for the changing seasons.[[/labelnote]], which heats a piece of metal. As the metal expands, it triggers a mechanism which causes the clock to run faster if it's behind, and slower if it's ahead.
**
ahead. This only works to count days, rather than actual elapsed time, because the rotation rate of the Earth is not constant. It happens that the biggest source of error in the Clock's timekeeping (about 10 parts per million) is climate change potentially melting the ice caps, which could make the length of the day up to 1 second longer.



** On a similar note, at 11:11 am on November 11th, in Anthem, Arizona, USA, sunlight shines directly through stained-glass disks mounted in five pillars (one for each branch of the U.S. military) at the Anthem Veterans Memorial. Most days, the sun's rays through the disks create a random collage of colored light on the Memorial's flagstones, but at that single moment each year, the colors line up to form the Great Seal of the United States.

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** * On a similar note, at 11:11 am on November 11th, in Anthem, Arizona, USA, sunlight shines directly through stained-glass disks mounted in five pillars (one for each branch of the U.S. military) at the Anthem Veterans Memorial. Most days, the sun's rays through the disks create a random collage of colored light on the Memorial's flagstones, but at that single moment each year, the colors line up to form the Great Seal of the United States.



8th Feb '18 12:53:18 PM eroock
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If the right day ''is'' specifically required, expect a cloudy sky [[CueTheSun to clear up]] at the last possible moment, so the characters won't have to wait a year to watch for it again. If the path for the light has obstacles, this trope may be combined with a LightAndMirrorsPuzzle.

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If the right day ''is'' specifically required, expect a cloudy sky [[CueTheSun to clear up]] at the [[JustInTime last possible moment, moment]], so the characters won't have to wait a year to watch for it again. If the path for the light has obstacles, this trope may be combined with a LightAndMirrorsPuzzle.
8th Feb '18 12:52:59 PM eroock
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If the right day ''is'' specifically required, expect a cloudy sky to clear up at the last possible moment, so the characters won't have to wait a year to watch for it again. If the path for the light has obstacles, this trope may be combined with a LightAndMirrorsPuzzle.

to:

If the right day ''is'' specifically required, expect a cloudy sky [[CueTheSun to clear up up]] at the last possible moment, so the characters won't have to wait a year to watch for it again. If the path for the light has obstacles, this trope may be combined with a LightAndMirrorsPuzzle.
9th Jan '18 7:28:58 AM JackG
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Added DiffLines:

* ''Series/BuffyTheVampireSlayer''. Spoofed when the Nerd Trio uses this technique to find a location on a map, only to have the map [[SolarPoweredMagnifyingGlass burst into flame from the concentrated sunlight]].
5th Dec '17 6:29:58 PM Sharlee
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* In E.F. Bensen's short story "Gavon's Eve", an occult ritual can only be performed on the one night each year when moonlight shines straight through a ''very'' narrow crack in a specific standing stone. The position where the slender moonbeam lands marks where the ritual needs to take place.


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* In ''Drawn: The Painted Tower'', you must assemble pieces of glass to block most of the light shining through a window, leaving an arrow-shaped part unblocked so sunbeams will point out a spot to dig.
6th Nov '17 5:32:23 AM Sharlee
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* Inverted on ''WesternAnimation/NatureCat'', in which the shadow of Hal's doghouse is used by the four friends to determine the time when a visiting squirrel will return. They already know ''where'' the shadow needs to appear from Daisy's photo, just not ''when'' it will get to the designated spot.
31st Oct '17 3:08:24 PM Sharlee
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Added DiffLines:

* In ''Film/DrPhibesRisesAgain'', the mechanical tomb in which Phibes sealed himself at the end of the previous film re-opens. Both the narration and Phibes's own mental monologue state that this event was triggered by moonlight falling on a specific location, indicating that a celestial conjunction Phibes has anticipated is imminent.
18th Apr '17 8:37:37 AM Sharlee
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Added DiffLines:

* Done with a very small statue set in the right place on a specific map in the 2013 film ''The Hunters''. It's unclear if this is really a valid way of locating a site or just the statue's owner making a ''Raiders of the Lost Ark'' reference to amuse her associates.
2nd Jul '16 10:36:56 AM nombretomado
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* ''{{BIONICLE}}'': subverted in the ''Mata Nui Online Game''; the Great Sundial is, of all things, ''underground'', so Takua has to use a gnomon and a [[FantasticLightSource Lightstone]] to simulate 4 o'clock on it to open it.

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* ''{{BIONICLE}}'': ''Toys/{{BIONICLE}}'': subverted in the ''Mata Nui Online Game''; the Great Sundial is, of all things, ''underground'', so Takua has to use a gnomon and a [[FantasticLightSource Lightstone]] to simulate 4 o'clock on it to open it.
6th Jun '16 5:16:54 AM Morgenthaler
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* In Creator/JulesVerne's ''JourneyToTheCenterOfTheEarth'', the entrance to the passage leading BeneathTheEarth is in a crater which is touched by the shadow of a mountain peak at noon during the last few days of June.
* Common in riddles in the ''{{Redwall}}'' series, such as in ''Mattimeo'' when the entrance to an underground city is located by following the shadow of a pine tree.
* In the SherlockHolmes story "The Musgrave Ritual", the eponymous character finds the old crown jewels by the shadow of a tree. He manages to do this even though ''the tree is no longer standing''.

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* In Creator/JulesVerne's ''JourneyToTheCenterOfTheEarth'', ''Literature/JourneyToTheCenterOfTheEarth'', the entrance to the passage leading BeneathTheEarth is in a crater which is touched by the shadow of a mountain peak at noon during the last few days of June.
* Common in riddles in the ''{{Redwall}}'' ''Literature/{{Redwall}}'' series, such as in ''Mattimeo'' when the entrance to an underground city is located by following the shadow of a pine tree.
* In the SherlockHolmes Literature/SherlockHolmes story "The Musgrave Ritual", the eponymous character finds the old crown jewels by the shadow of a tree. He manages to do this even though ''the tree is no longer standing''.
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