In Young’s double slit experiment both the slits are similar. If width of one of the slits is doubled then
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a
Dark fringes become narrower
b
Bright fringes become less bright
c
Dark fringes become slightly brighter
d
Bright fringes become narrower
answer is C.
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Detailed Solution
The wider fringe allows more light to pass through it.As a result, intensity of light (I1) emerging from the wider slit will be more than the intensity of light (I2) emerging from the narrow slit.Imax=I1+I22Imin=I1-I22