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Question 2: NCERT Solutions for 12th Class Physics: Chapter 10-Wave Optics

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Question 2: NCERT Solutions for 12th Class Physics: Chapter 10-Wave Optics

What is the shape of the wave front 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 the wave front of light from a distant star intercepted by the Earth.

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  1. Solution:
    (a) Spherical wave front : All particles vibrating in same phase will lie on a sphere.
    (b) Plane wave front: Light will be a parallel beam after passing through the convex lens.
    (c) Plane wave front : Light rays from a distant star are nearly parallel as a small portion of a huge spherical wave front is nearly plane.

    Check the complete chapter with solutions.

    NCERT Solutions for 12th Class Physics: Chapter 10-Wave Optics