A red LED emits light at 0.1 watt uniformly around it.

eSaral Updated on:
Question:

A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is :-

  1. 5.48 V/m 

  2. 7.75 V/m

  3. 1.73 V/m

  4. 2.45 V/m

Correct Option:

Solution:

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