Ray Optics and Optical Instruments - Result Question 59
62. For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive index :
(a) lies between
[2012M]
(b) lies between 2 and
(c) is less than 1
(d) is greater than 2
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Answer:
Correct Answer: 62. (b)
Solution:
- (b)
(b)
The angle of minimum deviation is given as
for minimum deviation
in case of
from Snell’s law
when
then
