MCQ
While entering from medium $A$ to medium $B$ if light slows down then _________ .
  • A
    $\angle i<\angle r$
  • B
    $\angle i=\angle r$
  • $\angle i>\angle r$
  • D
    $\angle i \leq \angle r$

Answer

Correct option: C.
$\angle i>\angle r$
(c)
$\angle i>\angle r$
Explanation:
While entering from medium A to medium B , if light slows down it means light is travelling from rarer medium to denser medium. Hence the ray of light bend towards normal and angle of incidence is greater than angle of refraction $i . e$, $\angle i>\angle r$.

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