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KEAM 2012 Physics and Chemistry Paper
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Question : 7
Total: 120
Which one of the following statements is correct?
Monochromatic light is never coherent
Monochromatic light is always coherent
Two independent monochromatic sources are coherent
Coherent light is sometimes monochromatic
Coherent light is always monochromatic
Validate
Solution:
The two sources of same frequency which emits waves with phase difference not changing with time, are called the coherent sources.
Two independent light sources are never coherent. Coherent light is always monochromatic.
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