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A monochromatic plane wave of speed c an...

A monochromatic plane wave of speed c and wavelength `lamda` is diffracted at a small aperture . The diagram illustrates successive wavefront. After what time will some portion of the wavefront XY reach P ?

A

`(3lamda)/(2c)`

B

`(2lamda)/(c)`

C

`(3lamda)/(c)`

D

`(4lamda)/(c)`

Text Solution

Verified by Experts

The correct Answer is:
C
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