MCQ
prism can produce a minimum deviation $\delta$ in a light beam. If three such prisms are combined, the minimum deviation that can be produced in this beam is:
- A$0$
- ✓$\delta$
- C$2\delta$
- D$3\delta$
✓
Answer
Correct option: B.
$\delta$
In combination $($refractive angles of prisms reversed with respect to each other$)$, the deviations through two prisms cancel out each other and the net deviation is due to the third prism only.
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