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Standard XII

Physics

YDSE in Water

In Young's do...

Question

In Young's double – slit experiment, the y – coordinates of central maxima and $10^{t h}$ maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be

2 cm, 7.5 cm

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3 cm, 6 cm

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2 cm, 4 cm

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$\frac{4}{3} c m, 103 c m$

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Solution

The correct option is C
2 cm, 4 cm

Fringe width, $w \infty λ$ . Therefore, $λ$ and hence w will decrease 1.5 times when immersed in the liquid. The distance between central maxima and 10th maxima is 3 cm in vacuum. When immersed in the liquid, it will reduce to 2 cm position of central maxima will not change while 10th maxima will be obtained at y = 4 cm.

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In Young's double – slit experiment, the y – coordinates of central maxima and 10th maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be

In Young's double – slit experiment, the y – coordinates of central maxima and $10^{t h}$ maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be