When the light diverges from a point source, the shape of the wavefront is:

1. Parabolic.

2. Plane.

3. Spherical.

4. Elliptical.

Subtopic:  Huygens' Principle |
83%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

When the light is coming from a distant star that is intercepted by the earth, the shape of the wavefront is:

1. Spherical.
2. Plane.
3. Elliptical.
4. None of these.

Subtopic:  Huygens' Principle |
66%
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Which of the following is not true?

 1 The speed of light is dependent on the colour of the light. 2 The speed of violet light is less than the speed of the red light in glass. 3 The frequency of light never depends upon the property of the medium. 4 When the light diverges from a point source, the shape of the wavefront is plane.
Subtopic:  Huygens' Principle |
73%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The 6563 Å ${\mathrm{H}}_{\mathrm{\alpha }}$ line emitted by hydrogen in a star is found to be red-shifted by 15 Å. The speed with which the star is receding from the Earth is:

1.
$$6.87 \times 10^{5} m/s$$
2.$$4.75 \times 10^{4} m/s$$
3.$$3.20 \times 10^{5} m/s$$
4.$$5.45 \times 10^{4} m/s$$

Subtopic:  Huygens' Principle |
53%
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NEET 2023 - Target Batch - Aryan Raj Singh
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