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Let Us List Some of the Factors, Which Could Possibly Influence the Speed of Wave Propagation: The Speed of Light in Vacuum, - Physics

Let us list some of the factors, which could possibly influence the speed of wave propagation:

(i) Nature of the source.

(ii) Direction of propagation.

(iii) Motion of the source and/or observer.

(iv) Wave length.

(v) Intensity of the wave.

On which of these factors, if any, does

(a) The speed of light in vacuum,

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Solution

The speed of light in a vacuum i.e., 3 × 108 m/s (approximately) is a universal constant. It is not affected by the motion of the source, the observer, or both. Hence, the given factor does not affect the speed of light in a vacuum.

Concept: Refraction and Reflection of Plane Waves Using Huygens Principle - Refraction of a Plane Wave
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APPEARS IN

NCERT Class 12 Physics Textbook
Chapter 10 Wave Optics
Q 14.1 | Page 384
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