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HardPhysics
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In a Young's double-slit experiment, the slit plane is first illuminated with monochromatic light of wavelength λ1. It is observed that the point P, nearest to the central maximum O, has an intensity equal to 50% of the intensity at O. When the experiment is repeated using light of wavelength λ2, the same P becomes the nearest point to O where the intensity is 25% of that at O. The ratio λ1/λ2 is equal to
A
4/3
B
3/4
C
4/7
D
7/4
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