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The magnetic field of an electromagnetic...

The magnetic field of an electromagnetic wave is given by
`3 xx 10^(-7) sin (10^(3) x + 6.28 xx 10^(12)t ).` The wave length of the electromagnetic wave is

A

6.28 cm

B

3.14 cm

C

0.63 cm

D

0.32 cm

Text Solution

Verified by Experts

The correct Answer is:
C
Comparing the given equation with
`B_(y)=B_(0)sin(kx+omegat)`
We get, `k=10^(3) or (2pi)/(lambda)=10^(3)`
`therefore lambda=(2pi)/(10^(3))m=6.28xx10^(-3)m=0.63cm`
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