A ray undergoes a minimum deviation at 40o when it is incident on equilateral triangular glass prism. Calculate the refractive index of the prism
A
1.48
B
1.50
C
1.53
D
1.67
Verified Correct Answer: C.
Physical Principles & Numerical Solution
n = \(\frac{\sin \frac{1}{2} (dm + A)}{\sin \frac{1}{2} A}\)
= \(\frac{\sin \frac{1}{2} (40 + 60)}{\sin \frac{1}{2} \times 60}\)
= 1.532
Source: Myschool Past Questions Archive (Record #35461)