Q6. An electromagnetic wave in vacuum has a frequency of \( 15 \, \text{MHz} \). What is its wavelength? (Given \( c = 3 \times 10^8 \, \text{m/s} \))
- A. 10 m
- B. 20 m
- C. 30 m
- D. 40 m
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Sign In FreeAn electromagnetic wave has a wave number \( k = 2 \, \text{rad/m} \). What is its wavelength in vacuum?
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