1 Answers
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The correct answer is
D) they have high degree of parallelism
Explanation-
The laser beams are perfectly parallel. so that they are very narrow and can travel a long distance without spreading. This is the feature of laser while they are monochromatic and coherent these are characteristics only.
asked Oct 24 12:00:00 AM
Sangeeta
Q: 22 A: 1924