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Two idential light waves propagating in ...

Two idential light waves propagating in the same direction have a phase difference `delta`. After they superpose, the intensity of the resulting wave will be proportional to

A

`cos delta`

B

`cos(delta/2)`

C

`cos^2(delta/2)`

D

`cos^2 delta`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Two identical light waves, propagating in the same direction, have a phase difference delta . After they superpose the intensity of the resulting wave will be proportional to

    A
    `cosdelta`
    B
    `cos(delta//2)`
    C
    `cos^(2)(delta//2)`
    D
    `cos^(2)delta`

  • Two identical light waves having phase difference 'phi' propagate in same direction. When they superpose, the intensity of resultant wave is proportional to

    A
    `cos^(2) phi`
    B
    `cos^(2) 'phi/2`
    C
    `cos^(2)'phi/3`
    D
    `cos^(2)'theta/4`

  • Two monochromatic light waves of amplitude 3A and 2A interfering at a point have a phase difference of 60^(@) . The intensity at that point will be proportional to:

    A
    `5A^(2)`
    B
    `13A^(2)`
    C
    `1A^(2)`
    D
    `19A^(2)`

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