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
- If two identical resistors are connected in series, the total resistance is R_s. If they are connected in parallel, the total resistance is R_p. What is R_s / R_p?
- If velocity is zero, kinetic energy is:
- A diver inside water sees the outside world through a circular area. This is due to:
- What is the relation between the focal length (f) and the radius of curvature (R) of a spherical mirror?
- Sound waves cannot travel through which of the following?