Showing posts with label Optics. Show all posts
Showing posts with label Optics. Show all posts
Weird Rainbows
Upside down rainbows Upside down rainbows, or ‘circumzenithal arcs’, to give them the proper name, are not caused by rain. Normal rainbows form when light r…
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Young's Double Slit Experiment
This is a classic example of interference effects in light waves. Two light rays pass through two slits, separated by a distance d and strike a screen a dista…
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What is a mirage? How is it formed?
A traveller has lost his way in the desert. Enduring thirst and hunger, he suddenly saw an oasis, so the overjoyed man quickly ran towards it. To his great di…
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At what condition a convex lens can behave as a diverging lens?
The ability of a lens to act as converging or diverging depends upon its refractive index. The refractive index n of the material of a lens depends upon the …
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How to construct the Camera Obscura ( Pin Hole Camera)
Make a circular hole in the shutter of a window, from whence there is a prospect of some distance; in this hole place a magnifying glass, either double or…
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