CBSE Class 10 Science 2021 Term 1 Solved Paper

Question : 20 of 60

Marks: +1, -0

A ray of light starting from air passes through medium

A

of refractive index 1.50 , enters medium

B

of refractive index 1.33 and finally enters medium

C

of refractive index 2.42. If this ray emerges out in air from

C

, then for which of the following pairs of media the bending of light is least?

air-A
A-B
B- C
C-air

Solution:

The difference of refractive index is minimum when the ray of light travels from medium A to medium B. Thus, the change in speed of light is minimum for A-B interface and therefore, the bending of light is least for A-B interface.

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