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A laser beam has intensity 2.5 xx (10^14...

A laser beam has intensity `2.5 xx (10^14)W (m^-2)`. Find the amplitudes of electric and magnetic fields in the beam.

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
`I_E=1/2=1/2 epsilon_0E^2c`
`=1/2 epsilon_0((epsilon_0)/sqrt2)^2c`
`E_0=sqrt(2I)/(epsilon_0c)`
`sqrt(2xx2.5xx10^14)/(8.86xx10^-12xx3xx10^8`
`4.3xx10^8 N//C`
Now,
`c=(E_0)`
or
`B_0=(E_0)/c`.
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