Which of the following is true regarding the speed of light?

A It is constant for all electromagnetic waves traveling in a vacuum.

B The speed in space varies with wavelength.

C Its value is 300,000 km/hr.

D The speed of light increases when it travels through matter

2 Answers

  • A) It is constant for all electromagnetic waves traveling in a vacuum.

  • A

    It's 299,792,458 m/s in a vacuum, slows down through matter and is independent of wavelength.

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