Question

Which of the following types of waves travels at the greatest speed through the vacuum?

• A. Radio waves
• B. Microwaves
• C. Ultraviolet light
• D. $X$-rays
• E. None of the above; all these waves would travel at the same speed

Answer 1

Answer: (E)

None of the above; all these waves would travel at the same speed

Since the speed of any types of wave in vacuum remains constant so all wave travel at the same speed.