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Ray optics

Question

If the angle of a prism is 60° and angle of minimum deviation is 40°, then the angle of refraction will be:

Moderate
Solution

r1  +  r2=A

At min. deviation   r1  =  r2=r  say

2r=Ar=A2=300



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ABC is an isosceles right angled triangle with the angle BAC 90o. A ray of light parallel to the base BC strikes the face AB.  The refracted ray in the prism strikes the base BC. If the refractive index of the material of the prism is 2, find the total angle of deviation of the final emergent ray


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