Which of the following is true about electromagnetic radiation?  a. Wavelength is proportional to frequency.  b. Wavelength has units of s-1 or Hz.  c. None of these statements are true.  d. Wavelength is inversely proportional to energy.  e. Waves of different wavelengths travel at different speeds in a vacuum

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Q: Velocity of electromagnetic wave is A. C = \µ,E, 新 B. C = µ,E, D. C = V E, Ho C. C = · H.

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