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10. Wave optics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics10. Wave optics1 Mark
MCQ
In a Young's double slit experiment, the fringe width will remain same, if ($D =$ distance between screen and plane of slits, $d =$ separation between two slits and $\lambda =$ wavelength of light used)
  • A
    Both $\lambda$ and $D$ are doubled
  • ✓
    Both $d$ and $D$ are doubled
  • C
    $D$ is doubled but $d $ is halved
  • D
    $\lambda$ is doubled but $d$ is halved
✓

Answer

Correct option: B.
Both $d$ and $D$ are doubled
b
(b)$\beta = \frac{{\lambda D}}{d}$

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