Identify the correct statements among the following.

(A) The wavefront for a point source of light is in a spherical shape, rays are all radial from the point source,
(B) All the points on a cylindrical wavefront vibrate in the same phase,
(C) A set of straight lines perpendicular to a wavefront are called rays of light. Light energy does not flow along these lines.
(D) Every point of a given wavefront acts as a fresh source of a secondary wavelet

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (3) → (A), (B) and (D) only

(A) The wavefront for a point source of light is in a spherical shape, rays are all radial from the point source — True; point source emits spherical wavefronts, rays are radial.

(B) All the points on a cylindrical wavefront vibrate in the same phase — True; points on a given wavefront are in phase.

(C) A set of straight lines perpendicular to a wavefront are called rays of light — False; rays are perpendicular to wavefronts and carry energy along them, so the statement "light energy does not flow along these lines" is incorrect.

(D) Every point of a given wavefront acts as a fresh source of a secondary wavelet — True; this is Huygens’ principle.