Question

Define wave front and draw the shape of wave front from (i) Point source (ii) convex lens.​

Answer 1

Answer:

Explanation:

i)The wave front originating from a point source is spherical in shape. It is because, the locus of all such points, which are equidistant from the point source, is a sphere.

ii) The wave front originating from a line source is cylindrical in shape. It is because, all the points, which are equidistant from the linear source, lie on the surface of a cylinder

Answer 2

Answer:

convex lens.The locus of points, which oscillate in phase is called a wavefront; thus a wavefront is defined as a surface of constant phase. In the given figure we consider a plane wave incident on a thin convex lens, the emerging wavefront is spherical and converges to point F which is known as the focus.