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In Fresnel's biprism experiment a mica s...

In Fresnel's biprism experiment a mica sheet of refractive index 1.5 and thickness `6xx10^(-6)m` is palced in the path of one of interfering beams as a result of which the central fringe gets shifted through five fringe widths. Then calculate the wavelength of light.

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`x=((mu-1)tbeta)/(lamda)=((1.5-1)tbeta)/(lamda)`
but, `t=5betatherefore5beta=(0.5tbeta)/(lamda)implieslamda=(t)/(10)=(6xx10^(-6))/(10)=6000Å`
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