Amplitude Of Electric Field In Parallel Beam Of Light Of Intensity 2 0 Wm 2 Is ________

The amplitude of the electric field in a parallel beam of light of intensity 2.0 Wm-2 is ________ (A) 38.8 … 1 (C) 9.7 NC-1 (D)…

Answers:

The correct option is (A) 38.8NC–1.

 Explanation:

Eo = √(2I / EoC)

 As    I = intensity = 2 W/m2

Eo = 8.85 × 10–12

C = 3 × 108 m/s

 Eo = √[(2 × 2) / (8.85 × 10–12 × 3 × 108)]

= √(1506.59)

= 38.81 N/C