What is Fresnel Biprism?

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Solution

$In a Fresnel's biprism experiment , the refracting angles of the prism were 1.5 ^o and the refracting index of the glass was 1.5 . With the single slit 5 cm from$
A Fresnel Biprism is a narrow, base-to-base double prism with an extremely tiny refracting angle.
This is the same as a single prism with one angle of about 179° and the other two angles of 0.5 degrees each.
The splitting of the wavefront reveals the interference
Monochromatic light passes through a small slit S and is split into two components by biprism.
One of these components seems to originate from S₁ and is refracted from the upper section of the biprism, while the other appears to come from S₂ and is refracted from the bottom portion.
As a result, S₁ and S₂ function as two virtual coherent sources that were created from the original source. In the darkened region, light waves from S₁ and S₂ collide, causing interference.
Fresnel biprism is an experiment that shows interference by the division of wavefront

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