JEE Mains · Physics · STD 12 - Wave optics
- JEE Mains 2019
- Medium
- MCQ
In a double slit experiment, when a thin film of thickness \(t\) having refractive index \(\mu \) is introduced in front of one of the slits, the maximum at the centre of the fringe pattern shifts by one fringe width. The value of \(t\) is (\(\lambda \) is the wavelength of the light used)
Pick an option to check your answer.
Answer & Solution
Correct Answer
(B) \(\frac{\lambda }{{\,\left( {\mu - 1} \right)}}\)
Step-by-step Solution
Detailed explanation
\(\Delta x=(\mu-1)\, t=1 \lambda\)
for one maximum shift
\(t=\frac{\lambda}{\mu-1}\)
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