NEET UG PHYSICS MCQ: WAVES

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Understanding +4 | -1

Out of the given waves (1), (2), (3) and (4)

y = a\sin \left( {kx + \omega t} \right)

...(

1

)

y = a\sin \left( {\omega t - kx} \right)

…(

2

)

y = a\cos \left( {kx + \omega t} \right)

…(

3

)

y = a\cos \left( {\omega t - kx} \right)

…(

4

)
Emitted by four different sources

{S_1},{S_2},{S_3}\,\,and\,\,{S_4}

respectively, interference phenomena would be observed in space under appropriate conditions when

View answer and explanation

Correct option: C

Source

{S_2}

emits wave (

2

) and 

{S_4}

 emits wave (

4

)

Option C (Source

{S_2}

emits wave (

2

) and 

{S_4}

 emits wave (

4

)) is correct because for interference to occur, the waves must be coherent, meaning they have a constant phase difference. Waves (2) and (4) are both traveling in the +x direction and have the same form, thus they can interfere.

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