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Q.

A monochromatic beam of light of wavelength $5000 A^{0}$ is used in Young’s double slit experiment. If one of the slits is covered by a transparent sheet of thickness $1.4 \times 10^{- 5} m$ , having refractive index of its medium 1.25. Then the number of fringes shifted is

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answer is 7.

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Detailed Solution

$N = \frac{(μ - 1) t}{λ} N = \frac{0.25 \times 1.4 \times 10^{- 5}}{5000 \times 10^{- 10}} = 7$

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