Question

Select One Correct Option from the following: As a wave propagates,
(A) the wave intensity remains constant for a plane wave.
(B) the wave intensity decreases as the inverse of the distance from the source for a spherical wave.
(C) the wave intensity decreases as the inverse square of the distance from the source for a spherical wave.
(D) total intensity of the spherical wave over spherical surface centred at the source remains constant at all times.

Answer 1

c option is correct I think

Answer 2

Select One Correct Option from the following: As a wave propagates,

(A) the wave intensity remains constant for a plane wave.

(B) the wave intensity decreases as the inverse of the distance from the source for a spherical wave.

✴️ (C) the wave intensity decreases as the inverse square of the distance from the source for a spherical wave.

(D) total intensity of the spherical wave over spherical surface centred at the source remains constant at all times.