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10. Wave optics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics10. Wave optics1 Mark
MCQ
The fringe width in Young's double-slit experiment can be increased if we decrease
  • ✓
    Separation of the slits
  • B
    Distance between the source and the screen
  • C
    Wavelength of the source
  • D
    All of these
✓

Answer

Correct option: A.
Separation of the slits
a
(a)

Fringe width $(\beta)=\frac{\lambda D}{d}$

Hence if we decrease $d\left(\beta \propto \frac{1}{d}\right)$

$\beta$ is increased.

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