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A He-Ne laser operating at 115 V & 2 A has an output power of 1 mW. What is its efficiency of conversion of electrical energy to coherent light energy?

written 6.9 years ago by neeta.vanage • 870

modified 2.8 years ago by pedsangini276 • 4.8k

Subject :- Applied Physics 2

Topic :- Lasers

Difficulty :- Medium

engineering physics

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1 Answer

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written 6.8 years ago by neeta.vanage • 870

modified 6.8 years ago by sanketshingote • 100

Given:

$V = 115 V, I = 2A, P = 1*10^{-3} W$

$\text {% efficiency}= \eta = X 100\\$ $ = X 100\ $ $= 0.0434 $

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