Q 9.22 At what angle should a ray of light be incident on the face of a prism of refracting angle so that it just suffers total internal reflection at the other face? The refractive index of the material of the prism is .
Let prism be ABC ,
as emergent angle ,
Now as we know in the prism
Now applying snells law at surface AB
Hence the angle of incident is 29.75 degree.
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