Question

The electric field of the emergent beam i
represented by
Ex = 36 sin(1.2 * 1072 – 3.6 10154) Vim
The average intensity of beam in W/m2 will be
approximately
(1) 6.88
(2) 3.44
(3) 1.72
(4) 0.86
​

Answer 1

Answer:

3)1.72

Explanation:

Intensity =Power/Area

I=1/2 ε$E^{2}$C

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

I=1.72