Select from the following the best experimental set-up for tracing the path of a ray of light passing through a rectangular glass slab:
(a) P
(b) Q
(c) R
(d) S
Answer
In the rectangular glass slab experiment, we ensure that
- Normal is in the middle of the
- Angle of incidence is 45 °
 
  
 
Since only case Q satisfies both conditions
So, the correct answer is (b) Q
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