Which of these is true for the speed of an electro-magnetic wave and the speed

Which of these is true for the speed of an electro-magnetic
wave and the speed of light ?

(a) The former is greater

(b) Both speeds are equal

(c) The latter is greater than the former

(d) None of these

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Which of these is true for the speed of an electro-magnetic wave and the speed of light ? (a) Th..

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( b ) Both speeds are equal

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