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A flood light will be covered with filte...

A flood light will be covered with filter that transmits red light. The electric field of the emerging beam is represented by a sinusoidal plane wave
`E_x=38.8sin(1.2xx10^7z-3.6xx10^(15)t)V//m`.
The average intensity of beam in` "watt"//m^2` will be:

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Verified by Experts

The correct Answer is:
`2`
Average intensity, `I_(av)=1/2 in_0E_0^2xxc`
`=((8.85xx10^(-12)xx(38.8)^2xx(3xx10^8))/2) ~~2W//m^2`
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