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MHT CET 2023 (12 May, Shift 1) · Biprism, Thin Films & Other Devices

Biprism, Thin Films & Other Devices question from MHT CET 2023 (12 May, Shift 1)

Q18MHT CET 2023 · 12 MAY · SHIFT 1Easy

Biprism, Thin Films & Other Devices

In two separate setups for Biprism experiment using same wavelength, fringes of equal width are obtained. If ratio of slit separation is $2 : 3$ then the ratio of the distance between the slit and screen in the two setups is

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Answer: (a)

$\beta = \frac{\lambda D}{d}$ ; same $\beta$ and $\lambda$ gives $D \propto d$ .
$\frac{D_1}{D_2} = \frac{d_1}{d_2} = \frac{2}{3}$ .
So the answer is (a) $2 : 3$ .

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