Physicsmedium · Past Paper
The angle of deviation of a prism is minimum when:
AAngle of incidence = Angle of emergence
BAngle of incidence = 90 degrees
CAngle of emergence = 0 degrees
DPrism is placed in water
✓ Correct Answer: A — Angle of incidence = Angle of emergence
Minimum deviation occurs when the ray passes symmetrically through the prism, meaning i = e.
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