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The inclined faces of a biprism of refractive index 1.50 make an angle of 2° with the base. A slit illuminated by monochromatic light is placed at a distance of 10 cm from the biprism. If the distance between two dark fringes observed at a distance of 1 m from the prism is 0.18 mm, find the wavelength of light used. |
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