Weegy: Electromagnetic waves vary in B. wavelength and frequency.
User: To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its
D. amplitude. User: An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency?
A. 3.0 x 108 m/s
B. 4.3 x 109 Hz
C. 3.0 x 109 Hz
D. 4.3 x 108 m/s Weegy: B. 4.3 x 109 Hz is the ... (More)