Answer:
intensity is 11.0145 W/m^2
Energy is 5.07 J
Explanation:
Given data
amplitude E =91.1 V/m
area = 0.0269 m2
time t = 17.1 s
to find out
intensity and energy
solution
we know intensity formula that is given below
intensity = E(rms)² / (cμ0)
here c is speed of light and μo is permeability of free space
we know these constant value c = 2.99 x 10^8
μo = 1.26 x 10^-6
put all these value and we get intensity
intensity = (91.1/√2)² / (2.99 x 10^8 × 1.26 x 10^-6)
intensity = 4149.605 / 3.7674 x 10^2
intensity is 11.0145 W/m^2
and Energy is calculated by this formula
Energy = intensity × time × area
put all value now here
Energy = 11.0145 × 17.1 × 0.0269
Energy is 5.07 J
