Out of the given four waves (1), (2), (3) and (4),
…(1)
…(2)
….(3)
….(4)
emitted by four different sources 
and 
respectively, interference phenomenon would be observed in space under appropriate conditions when -
A
Source 
emits wave (1) and 
emits wave (4)
emits wave (1) and emits wave (4) B
Source 
emits wave (2) and 
emits wave (4)
emits wave (2) and emits wave (4) C
Source 
emits wave (1) and 
emits wave (3)
emits wave (1) and emits wave (3) D
Interference phenomenon cannot be observed by the combination of any of the above waves
Text Solution
Verified by ExpertsThe correct answer is:
B
For interference, two waves must have a constant phase relationship. Equation ' 1 ' and ' 3 ' and ' 2 ' and ' 4 ' have a constant phase relationship of 
out of two choices. Only one 
emitting '2' and 
emitting ' 4 ' is given
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