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 :
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A beam of unpolarised light of intensity is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of relative to that of A. The intensity of the emergent light is: Stuck on the question or explanation?
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Question Text | 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 : |
Answer Type | Video solution: 1 |
Upvotes | 150 |