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In a Young's double slit experiment, the...

In a Young's double slit experiment, the separaton between the two slits is d and the wavelength of the light is `lambda`. The intensity of light fallin on slit 1 is four times the intensity of light falling on slit 2. Choose the correct choice (s).

A

if `d=lamda`, the screen will contain one maximum

B

if `lamda lt d lt 2 lamda`, at least one more maximum (besides the centrl maximum) will be observed on the screen.

C

If the intersity of light falling on slit 1 is reduced so that it becomes equal to that of slit 2 the intensities of the observed dark and bright fringes will increased

D

If the intensity of light falling off on slit 2 is increased so that it becomes equal to that of slit 1, the intensity of the observed dark and bright fringes will increases.

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The correct Answer is:
A, B
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