What happens if a light falls on a glass slab making 90° at its surface?
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Answer:
it will go straight with no deviation
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Explanation:
Light falling perpendicularly on glass slab
When light falls perpendicularly or normally on the surface of a glass slab, it goes straight. There is no bending of ray of light on entering the glass slab or coming out of it. In this case angle of incidence and angle of refraction is zero.
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