In Young's double slit experiment, the distance between screen and aperture is 1 m. The slit width is 2 mm. Light of 6000 is used. If a thin glass plate ( μ = 1.5) of thickness 0.04 mm is placed over one of the slits, then there will be a lateral displacement of the fringes by (a) 0.5 cm (b) 1 cm (c) 1.5 cm (d) 2 cm

Answer: (b). Shift = ((μ-1)tD)/(d). = 0.5×0.04×10⁻³×12×10⁻³ = 0.01 m So the answer is (b) 1 cm.

In Young's double slit experiment, the distance between screen and… | MHT CET 2025 (20 Apr, Shift 1)

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YDSE: Film, Medium & Two Wavelengths

In Young's double slit experiment, the distance between screen and aperture is 1 m. The slit width is 2 mm. Light of $6000\ \text{\AA}$ is used. If a thin glass plate ( $\mu = 1.5$ ) of thickness 0.04 mm is placed over one of the slits, then there will be a lateral displacement of the fringes by

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Answer: (b)

Shift $= \frac{(\mu-1)tD}{d}$ .
$= \frac{0.5\times0.04\times10^{-3}\times1}{2\times10^{-3}} = 0.01$ m
So the answer is (b) 1 cm.

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