Laser beams are used to measure long distances becauseA. They are monochromaticB. They are highly polarisedC. They are coherentD. They have high degree of parallelism

Laser beams are used to measure long distances becauseA. They are mono

1.	Laser beams are used to measure long distances becauseA. They are monochromaticB. They are highly polarisedC. They are coherentD. They have high degree of parallelism
Answer» Correct Answer - D

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Laser beams are used to measure long distances becauseA. They are monochromaticB. They are highly polarisedC. They are coherentD. They have high degree of parallelism

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