Question

9.
The electric field of the emergent beam
represented by
E = 36 sin(1.2 * 10'z - 3.6 10157) Vim
The average intensity of beam in W/m2
approximately
(1) 6.88
(2) 3.44
(3) 1.72
(4) 0.86
in W/m² will be​

Answer 1

Answer:

3)1.72

Explanation:

Intensity = Power /Area

I=1/2 εC$E^{2}$

I=1/2 8.85×$10^{-12}$×3×$10^{8}$× $(36)^{2}$

I=1.72