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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

`0.28 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 gien equation with
`B _(y) = B _(0) sin (kx + omega t )`
We get, `k = 10 ^(3) or"" (2pi)/(lamda )=10 ^(3)`
`therefore lamda = (2pi )/(10 ^(3)) cm = 6.28 xx 10 ^(-3) cm = 0.63cm`
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