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In an experiment using Fresnel biprism, ...

In an experiment using Fresnel biprism, fringes of width `0.185 xx 10^(-3)m` are observed at a distance of 1 m from the slit. Images are of the coherent sources are then produced at the same distane from the slit by placing a convex lens at a distance of 0.3 m form the slit. The images are found to be separated by `0.7 xx 10^(-2)m`. Calculate the wavelength of the light used.

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The correct Answer is:
`[5550 Å]`
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