Q.

The ratio of contributions made by the electric field  and magnetic field components to the Intensity of an em wave is

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a

C:1

b

C2:1

c

1:1

d

C:1

answer is C.

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Detailed Solution

We know that,  uB=uE here  uE=Average electric field energy density      uB=Average magnetic field energy density  Total Intensity =I=IE+IB=uEc+uBc So, IEIB=uEuB=11
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