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Which of the following is not true of all electromagnetic waves, only one answer is correct,

A. The electric and magnetic fields must be perpendicular to each other.
B. the wave is a trasverse wave.
C. Only wavelengths of 400 to 700 nm are allowed.
D. In Vacuum, the speed of the wave is given by c. the speed of light.

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Reference No.:- M91074993

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