What is the nature of wavefront from a point source in an isotropic medium?

Correct option is B

The correct answer is (B) Spherical

Explanation:

• In an isotropic medium, when a point source emits waves, the wavefronts spread out equally in all directions from the point source. This results in the formation of spherical wavefronts.

• The waves propagate outward, forming concentric spheres with the point source at the center.

• An isotropic medium means that the properties of the medium are the same in all directions, so the wavefronts are spherical, maintaining symmetry in all directions.

Information Booster:

• Wavefronts are surfaces of constant phase, and the nature of wavefronts depends on the shape of the source.

• For a point source, the waves propagate outward in all directions, leading to spherical wavefronts.

• This is in contrast to other wavefronts like plane wavefronts (from a distant source) or cylindrical wavefronts (from a line source).

Additional Information:

• Option A (Cylindrical): Cylindrical wavefronts form when the source is a line, not a point.

• Option C (Elliptical): This would occur in special cases, such as in elliptical mirrors, not from a point source in an isotropic medium.

• Option D (Plane): Plane wavefronts occur when the source is far away, effectively acting like a point source at infinity.