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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?

Subject :- Applied Physics 2

Topic :- Lasers

Difficulty :- Medium

1 Answer
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Given:

V=115V,I=2A,P=1103W

% efficiency=η=X100 =X100  =0.0434

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