Question

a certain prism is found to produce a minimum deviation of 51° 0 while it produces deviation of 62° 48 for two values of angel of incidence namely 40° 42 and 82° 6. determine refractive angle of prism, angel of incidence for minimum deviation and reflective index of prism
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Answer 1

Answer:

For the same deviation i and  e are exchangeable

So for δ=44∘,i=42∘$  and  e=62∘

So A = i+e-δ = 60∘

δmin=38∘

i=e at min deviation

So, δmin=2i−A=>38=2i−60

⟹i=49∘

Answer 2

Answer:

prism is found to give a minimum deviation of

. The same prism gives a deviation of

for two values of the angles of incidence

' and

. Determine the refracting angle of the prism and the refractive index of the prism material.