. 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 :

Question:

Ared LED emits light at $0.1$ watt uniformly around it. The amplitude of the electric field of the light at a distance of $1 \mathrm{~m}$ from the diode is :

  1. $5.48 \mathrm{~V} / \mathrm{m}$

  2. $7.75 \mathrm{~V} / \mathrm{m}$

  3. $1.73 \mathrm{~V} / \mathrm{m}$

  4. $2.45 \mathrm{~V} / \mathrm{m}$

Correct Option: 4

JEE Main Previous Year 1 Question of JEE Main from Physics Semiconductor Electronics : Materials, Devices and Simple Circuits chapter.
JEE Main Previous Year 2015

Solution:

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