A plane electromagnetic wave travels in vacuum along z -direction. If the frequency of…
Physics · Class 12 · CBSE — Electromagnetic Waves
A plane electromagnetic wave travels in vacuum along z-direction. If the frequency of the wave is 40 MHz then its wavelength is
- 5 m
- 7.5 m
- 8.5 m
- 10 m
Answer
(B) 7.5 m
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