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Wave Optics

  1. Two slits in Young’s experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the interference pattern,
    Imax
    is :
    Imin
    1. 121
      49
    2. 49
      121
    3. 4
      9
    4. 9
      4
Correct Option: D

The ratio of slits width

=
1
(given)
25

I1
=
25
I21

I ∝ A2
I1
=
A12
=
25
I2A221

or
A1
=
5
A21

Amax
=
A1 + A2
AminA1 - A2

=
5 + 1
=
6
=
3
5 - 142

=
3
2
2

=
9
4



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