AP EAMCET20228 Jul 2022Morning ShiftPhysicsWave OpticsActual
Assertion A : For light diverging from a point source, the intensity at the wavefront does not depend on the distance. Reason R : In a diverging beam of light from a point source, spherical wavefront is observed.
Options
- A(A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true, but (R) is not the correct explanation of (A).
- C(A) is true but (R) is false
- D(A) is false but (R) is true.
Correct answer
D. (A) is false but (R) is true.
Step-by-step solution
We have I= E A t = E (4 r^2 ) t 1 r^2 So, intensity depends on distance (A) is false and, for diverging beam wavefront is spherical as shown So ( R ) is true.