KCET · Physics · Wave Optics
For light diverging from a finite point source,
- A the intensity decreases in proportion to the distance squared
- B the wavefront is parabolic
- C the intensity at the wave front does not depend on the distance
- D the wave front is cylindrical
Answer & Solution
Correct Answer
(A) the intensity decreases in proportion to the distance squared
Step-by-step Solution
Detailed explanation
A light diverging from a finite point source produces spherical wavefront that moves in all directions from the point. The intensity of light dependent on the distance and it follows the inverse square law. Hence, the intensity decreases with an increase in the distance from the source.
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