6. If the intensities of the two interfering beams
in Young's double slit experiment be 11 and 12
then the contrast between the maximum
and minimum intensity is good when
(1) I4 is much greater than 12
(2) I, is much smaller than la
(3) either It or 12 is zero
(4) I, = 1₂
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Explanation:
Contrast would be good when the intensities of both the beam is equal, so that intensity of bright fringes is maximum, while those of dark fringes is minimum i.e., zero.
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