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History of Snell's Law

Light travels...

Question

Light travels in a straight line because :

A

it is not absorbed by atmosphere

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B

its velocity is very high

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C

diffraction effect is negligible

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D

due to interference

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Solution

The correct option is C diffraction effect is negligible
Diffraction is the effect which causes light to change path when it meets obstacles. But as diffraction effect is very small light travels in straight line .

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