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In Fresnel's biprism experiment,the refr...

In Fresnel's biprism experiment,the refracting angles of the prism were `1.5^(@)` and the refractive index of the glass was `1.5` With the single slit `5cm` from the biprism, and using light of wavelength `580nm` ,fringes were formed on a screen "1m" from the single slit. The fringe width is:

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