JEE Mains · Physics · STD 12 - 10. Wave optics
Monochromatic light of wavelength \(500 \mathrm{~nm}\) is used in Young's double slit experiment. An interference pattern is obtained on a screen When one of the slits is covered with a very thin glass plate (refractive index \(=1.5\) ), the central maximum is shifted to a position previously occupied by the \(4^{\text {th }}\) bright fringe. The thickness of the glass-plate is _______\(\mu \mathrm{m}\).
- A \(1\)
- B \(2\)
- C \(3\)
- D \(4\)
Answer & Solution
Correct Answer
(D) \(4\)
Step-by-step Solution
Detailed explanation
\((\mu-1) \mathrm{t}=\mathrm{n} \lambda\) \((1.5-1) \mathrm{t}=4 \times 500 \times 10^{-9} \mathrm{~m}\) \(\mathrm{t}=4000 \times 10^{-9} \mathrm{~m}\) \(\mathrm{t}=4 \mu \mathrm{m}\)
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