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For light diverging from a point source...

For light diverging from a point source

A

the wavefront is spherical

B

the intensity decreases in proportion to the distance squared

C

the wavefront is parabolic

D

the intensity at the wavefront does not depend on the distance

Text Solution

Verified by Experts

The correct Answer is:
A, B
For light diverging from a point source, the wavefront is spherical.
The intensity I of the wavefront varies inversely as the area of wavefront, given by , `A = 4 pi r^2`
`:. I prop 1/(r^2)`
Thus, intensity decreases in proportion to the distance squared.
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