Question

Which statement is true about the speed of waves in the electromagnetic spectrum?

a) the speed of all electromagnetic wave is inversely proportional to their wavelength.
b) the speed of all electromagnetic waves is directly proportional to their frequency.
c) in a vacuum, all electromagnetic waves travel at speeds between 1.098 x10^5 and 2.998 x 10^8 m/s.
d) in a vacuum, all electromagnetic waves travel at the peed of 2.998 x 10^8 m/s.

Answer 1

I think the correct answer from the choices listed above is option D. The speed of waves in the electromagnetic spectrum when in vacuum travel at the speed of 2.998 x 10^8 m/s. Hope this answers the question. Have a nice day.