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Laser beams are used to measure long dis...

Laser beams are used to measure long distances because

A

They are monochromatic

B

They are highly polarised

C

They are coherent

D

They have high degree of parallelism

Text Solution

Verified by Experts

The correct Answer is:
d
Laser beam 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 thes are charactristics only.
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