Question

A beam of light propagating in medium A with index of refraction n (1) passes across an interface into medium B with index of refraction n(2). The angle of incidence is greater than the angle of refraction; v(1) and v(2) denotes the speed of light in A and B. Then which of the following is true

• A. v(1) > v(2) and n(1) > n(2)
• B. v(1) > v(2) and n(1) < n(2)
• C. v(1) < v(2) and n(1) > n(2)
• D. v(1) < v(2) and n(1) < n(2)

Answer 1

Answer: (B)

v(1) > v(2) and n(1) < n(2)

Answer 2

∠ i > ∠ r, it means light ray is going from rarer medium (1) to denser medium.

So $v ( A ) > v ( B )$ and $n ( A ) < n ( B )$