1.

In Fresnel's biprism experiment the width of 10 fringes is 2cm which are formed at a distance of 2 meter from the slit. If the wavelength of light is \[5100\overset{o}{\mathop{A}}\,\] then the distance between two coherent  sources will be

A. \[5.1\times {{10}^{-4}}m\]
B. \[5.1\times {{10}^{4}}m\]
C. \[5.1\times {{10}^{-4}}mm\]
D. \[10.1\times {{10}^{-4}}cm\]
Answer» B. \[5.1\times {{10}^{4}}m\]


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