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Asked by venkat
23rd May 2018,
11:20 AM
Answered by Expert
Answer:
when refraction is taking place in a prism, we have relation between angles r+r' = A
where A is angle of prism, r and r' are angle of refractions as shown in figure.
For minimum deviation we have r = r' = A/2
we have refractive index μ = sin(e) /sin(r')
for beginning of internal reflection i.e. the emergent ray just grazing on prism surface, we have e =90º
Answered by Expert
25th May 2018,
3:24 PM
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