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:

E_o = √(2I / E_oC)

 As    I = intensity = 2 W/m²

E_o = 8.85 × 10^–12

C = 3 × 10⁸ m/s

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

= √(1506.59)

= 38.81 N/C