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Suppose that intensity of a laser is ((3...

Suppose that intensity of a laser is `((315)/(pi)) W//m^2` . The rms electric field, in units of V/m associated with this source is close to the nearest with this source is close to the nearest integer is _______ .
`(in_0 = 8.86 xx 10^(-12) C^2 Nm^(-2) , c= 3 xx 10^8 ms^(-1))`

Text Solution

Verified by Experts

The correct Answer is:
275
`(1)/(2) C epsilon_(0) E_("rms") ^(2) = (315)/(pi)`
`E_("rms") = sqrt(( 315 xx 2)/( pi xx 3 xx 10^(8) xx 8.86 xx 10 ^(-12)))`
`= sqrt(( 630)/( 83.4612 xx 10^(-4)))`
`= sqrt(7 . 5484xx 10^(4))`
`= 2.75 xx 10^(2) = 2.75 xx 10 ^(2) = 275`
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