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2
questions
18
votes
2
answers
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Why are the edges of the shadow so bright?
Today I noticed something while playing with my specs (having diverging lenses).
Have a look at it :
This is the shadow of my specs on the wall in sunlight. The region of the lens appears darker and ...
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3
votes
1
answer
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"fish appear to be 30% smaller because of the curvature of the tunnel"
I recently visited an aquarium in Malaysia and there was a sign saying that the exhibits in their main tank appear to be smaller by 30% especially when viewed through their tunnel (https://www.youtube....
