7. Which of the following statements is true regarding the speed of light in a vacuum?

(a) It is constant and independent of the wavelength of light.

(b) It varies with the wavelength of light.

(c) It varies with the intensity of light.

(d) It varies with the direction of light.



Answer :

Final answer:

The speed of light in a vacuum is constant and does not depend on the wavelength of light.


Explanation:

The speed of light in a vacuum is constant and independent of the wavelength of light. This fundamental constant, denoted by c, has a maximum speed in vacuum of 3 × 10^8 m/s. It remains the same regardless of the observer's motion relative to the source.


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