Nature of wavefront originating from a point source of light at a finite distance is ------- a) cylindrical b) spherical c) plane d) elliptical
Answers
Answer:
nature of the wave front originating from a point a source of light at a finit distance is
Answer:
The nature of the wavefront originating from a point source of light at a finite distance is spherical i.e.option(b).
Explanation:
Let's analyze the options one by one and we will get our answer.
(a) Cylindrical wavefront-When the source of light is linear in shape then the center of all points is equidistant from the linear sources lies on a cylinder and the wavefront formed is called a cylindrical wavefront.
(b)Spherical-if we have a point source of light then the center of all the points which are vibrating in the same phase lies on a sphere and wave wavefront so formed is called spherical wavefront.
(c) Plane-it is a small part of a spherical or cylindrical wavefront when the source of light is at a large distance from the wavefront
(d)elliptical-there is no such wavefront such as elliptical.
Hence, after analyzing the options we get to know that the nature of the wavefront originating from a point source of light at a finite distance is spherical i.e.option(b).