Naked Science Forum
General Science => General Science => Topic started by: Vatsal on 24/04/2010 14:30:03
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Vatsal asked the Naked Scientists:
If i close my eyes 80%-90% and watch a source of light (moon,street light), why does there appear to be a light ray going straight "up" from the source, rather than in any other direction?
If not familiar, you can try it right now by looking at, say, a window and closing your eyes to see the vertical effect.
What do you think?
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If the ray only occurs when you squint it is probably the result of diffraction at the straight(ish) edge of your eyelid which is then over your pupil.
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