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MHT CET 2026 (15 May, Shift 1) · YDSE: Film, Medium & Two Wavelengths

YDSE: Film, Medium & Two Wavelengths question from MHT CET 2026 (15 May, Shift 1)

Q8MHT CET 2026 · 15 MAY · SHIFT 1Medium

YDSE: Film, Medium & Two Wavelengths

In Young's experiment, one of the slit is covered with a transparent sheet of thickness $3.6 \times 10^{-3}$ cm due to which position of central image shifts to a position originally occupied by $30^{th}$ bright fringe. The refractive index of the sheet is ( $\lambda = 6000$ \AA)

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Answer: (a)

Shift by $n$ fringes: $(\mu-1)t = n\lambda$ .
$\mu - 1 = \frac{30\times6\times10^{-7}}{3.6\times10^{-5}} = 0.5$
So $\mu = 1.5$ , answer (a).

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