Select from the following the best experimental  set-up for tracing the path of a ray of light passing  through a rectangular glass slab: 

Question 7 [CBSE Delhi, 2016].jpg

(a) P 

(b) Q  

(c) R 

(d) S  



In the rectangular glass slab experiment, we ensure that

  • Normal is in the middle of the 
  • Angle of incidence is 45 °

Rectangular glass slab Experiment.jpg

Since only case Q satisfies both conditions

So, the correct answer is (b) Q

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo