If one of the two slits of Young's double slit experiment is halved, the

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Fringes disappear

Dark fringes become darker and bright fringes become brighter

Dark fringes become brighter and bright fringes become darker

Both bright and dark fringes become darker

answer is C.

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Detailed Solution

Imax=I1±I22 if I1=I2=I Imax=4I Imin=I1-I22 if I1 =I2=I Imin=0 If I2

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