In a vacuum, the velocity of all electromagnetic waves
A. is zero.
B. is nearly 3 ˛ 108 m/s.
C. depends on the frequency.
D. depends on their amplitude.
Answer:B
In a vacuum, the velocity of all electromagnetic waves
A. is zero. B. is nearly 3 ˛ 108 m/s. C. depends on the frequency. D. depends on their amplitude.