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Spectroscopy deals with interaction of electromagnetic radiation with matter. What is the speed of this radiation in vacuum in m/s?
Question

Spectroscopy deals with interaction of electromagnetic radiation with matter. What is the speed of this radiation in vacuum in m/s?

A.

6 × 10⁸

B.

5 × 10⁸

C.

4 × 10⁸

D.

3 × 10⁸

Correct option is D


The speed of electromagnetic radiation in a vacuum (i.e., the speed of light, denoted by c) is approximately:
3 × 10⁸ m/s
This constant is fundamental in physics and essential in spectroscopy, where EM radiation interacts with matter.

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