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Electromagnetic waves in vacuum all travel at a speed of about
A3.0 x 10^5 m/s
B3.0 x 10^6 m/s
C3.0 x 10^10 m/s
D3.0 x 10^8 m/s
Answer & Solution
Correct answer: D. 3.0 x 10^8 m/s
All electromagnetic radiation moves at the speed of light, about 3.0 x 10^8 m/s, in vacuum.
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