All electromagnetic waves travel through a vacuum at
A. the same speed.
B. speeds that are proportional to their frequency.
C. speeds that are inversely proportional to their frequency.
D. none of the given answers
Answer:A
All electromagnetic waves travel through a vacuum at
A. the same speed. B. speeds that are proportional to their frequency. C. speeds that are inversely proportional to their frequency. D. none of the given answers