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Q.

The speed of electromagnetic waves in a medium of relative permeability 2.3 and relative permittivity 1.3 is

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a

1.73 × 108  ms−1

b

13.63 × 106  ms−1

c

1.83 × 108  ms−1

d

3.63 × 108  ms−1

answer is D.

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Detailed Solution

The velocity of an electromagnetic wave in any medium can be written as 

v=cμrεr=3×1082.3×1.3=3×108 m/s

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