Student Login

Home›Chapters›Wave Optics PYQs›YDSE: Film, Medium & Two Wavelengths›Question 59

JEE Main 2019 (9 Apr, Shift 1) · YDSE: Film, Medium & Two Wavelengths

YDSE: Film, Medium & Two Wavelengths question from JEE Main 2019 (9 Apr, Shift 1)

Q59JEE Main 2019 · 9 APR · SHIFT 1Medium

YDSE: Film, Medium & Two Wavelengths

The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness t and refractive index μ is put in front of one of the slits, the central maximum gets shifted by a distance equal to n fringe widths. If the wavelength of light used is $\lambda$ , t will be:

Show answer and solution

Answer: (d)

Shift of $n$ fringe widths means extra path $= n\lambda$ .
$(\mu - 1)t = n\lambda \Rightarrow t = \dfrac{n\lambda}{\mu - 1}$
So the answer is (d) $\frac{n\lambda}{(\mu - 1)}$ .

Report a mistake

More questions on YDSE: Film, Medium & Two Wavelengths

In Young's double slit experiment fifth dark fringe is formed opposite to one of the…MHT CET 2019 (3 May, Shift 1)
Consider a Young’s double slit experiment as shown in figure. What should be the slit…JEE Main 2019 (10 Jan, Shift 2)
In a Young's double slit experiment, the slits are placed 0.320 mm apart. Light of…JEE Main 2019 (9 Jan, Shift 2)
Young's double slit experiment is first performed in air and then in a medium other than…NEET 2017
In a Young’s double slit experiment, slits are separated by 0.5 mm, and the screen is…JEE Main 2017
The intensity at the maximum in a Young's double slit experiment is I 0. Distance between…NEET 2016 (Phase 1)
Using monochromatic light of wavelength λ, an experimentalist sets up the Young's double…JEE Main 2014 (9 Apr, Shift 1)
A thin glass plate of thickness 2500/3λ ( λ is wavelength of light used) and refractive…JEE Main 2013 (25 Apr, Shift 1)