Question

Show that if the angle of a prism is twice the critical angle of glass, there will be no emergent ray.​

Answer 1

Answer:

Angle of prism= A = r1 + r2

in case when i1 = i2 = 90 degrees

than r1 = r2 = C

c = critical angles 

so, A = C + C

A = 2C

while the critical angle is defined as the angle of refraction when a ray of light enters from on side and refracts and comes out from the other side of the prism 

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