First slide

Reflection of light

Question

In a room containing smoke particles, the intensity due to a source of light will :

Easy

A

obey the inverse square law
B

be constant at all distances
C

increase with distance from the source than the inverse fourth power law
D

fall faster with distance from the source than the inverse fourth power law

Solution

The inverse square law and inverse fourth power law do not hold in smoked filled room. So, the intensity of source falls faster.

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