(a) When light diverges from a point source, the shape of the wavefront is spherical. This means that the wavefront expands outward in all directions from the point source, forming a spherical shape.

(b) When light emerges out of a convex lens with a point source placed at its focus, the shape of the wavefront becomes a plane. This is because the convex lens converges the light rays and makes them parallel, resulting in a flat wavefront.

(c) When a portion of a wavefront of light from a distant star is intercepted by the earth, the shape of the wavefront is approximately planar. This is because the light rays from a distant star can be considered as parallel, and when they reach the earth, they form a flat wavefront due to their parallel nature.

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(a) When light diverges from a point source, the shape of the wavefront is spherical. This means that the wavefront expands outward in all directions from the point source, forming a spherical shape.

(b) When light emerges out of a convex lens with a point source placed at its focus, the shape of the wavefront becomes a plane. This is because the convex lens converges the light rays and makes them parallel, resulting in a flat wavefront.

(c) When a portion of a wavefront of light from a distant star is intercepted by the earth, the shape of the wavefront is approximately planar. This is because the light rays from a distant star can be considered as parallel, and when they reach the earth, they form a flat wavefront due to their parallel nature.

Knowee AI · Accepted Answer

(a) When light diverges from a point source, the shape of the wavefront is spherical. This means that the wavefront expands outward in all directions from the point source, forming a spherical shape.

(b) When light emerges out of a convex lens with a point source placed at its focus, the shape of the wavefront becomes a plane. This is because the convex lens converges the light rays and makes them parallel, resulting in a flat wavefront.

(c) When a portion of a wavefront of light from a distant star is intercepted by the earth, the shape of the wavefront is approximately planar. This is because the light rays from a distant star can be considered as parallel, and when they reach the earth, they form a flat wavefront due to their parallel nature.

hat is the shape of the wavefront in each of the following cases :(a) light diverging from a point source(b) light emerging out of a convex lens when a point source is placed at its focus.(c) The portion of a wavefront of light from a distant star intercepted by the earth

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