If a light signal and a radio signal were emitted simultaneously from the Moon, the first signal to reach Earth would be
A) radio.
B) light.
C) both
D) neither
Correct Answer:
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Q3: Relative to radio waves,the velocity of visible
Q8: A wave with a long wavelength has
Q9: The frequency of an electromagnetic wave and
Q12: Both sound and light can travel in
A)a
Q14: Which of the following occupies the smallest
Q15: A wave with a high frequency has
Q19: The main difference between a radio wave
Q20: The source of electromagnetic waves is vibrating
A)electric
Q22: Relative to ultraviolet waves,the wavelength of infrared
Q36: An electron vibrating to and fro 1000
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