Physicsmedium · Past Paper
A ray of light passes from air into a liquid. The angle of incidence is 45 and angle of refraction is 30. Find refractive index.
A1.414
B1.5
C1.2
D2.0
✓ Correct Answer: A — 1.414
n = sin(45)/sin(30) = (1/sqrt(2)) / (1/2) = 2/sqrt(2) = sqrt(2) ≈ 1.414.
Share this question
More from Physics
- Which of the following is correct for a body starting from rest?
- A body covers 1/3 of its journey with speed 'u', next 1/3 with 'v' and last 1/3 with 'w'. The average speed is:
- Which of the following represents the rate of transfer of energy?
- A ball is thrown upward with a speed of u. It passes a window of height 'h' at a height 'H' from the ground. How much time does it take to cross the window?
- An object covers 1/4th of a circular path of radius r. The magnitude of its displacement is: