How to solve this 
Asked by amitjena226
21st December 2017,
10:30 PM
Answered by Expert
Answer:
Because the laser beam has very less divergence (angular spread) as compared to other light sources, it can travel long distance without getting diffused. This makes laser beam unidirectional.
answer:- 4
Answered by Expert
22nd December 2017,
11:24 AM
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