Physicshard · Past Paper
The refractive index of a medium is 1.732. What is the angle of refraction if the angle of incidence is 60 degrees?
A30 degrees
B45 degrees
C60 degrees
D90 degrees
✓ Correct Answer: A — 30 degrees
sin(r) = sin(60) / 1.732 = (0.866) / 1.732 = 0.5. So r = 30 degrees.
Share this question
More from Physics
- The magnifying power of a telescope can be increased by:
- A wire is stretched by 1 mm by a force of 1 kN. The work done in stretching is:
- A bullet loses 1/20th of its velocity in passing through a plank. What is the minimum number of such planks required to stop the bullet?
- If the escape velocity on Earth is 11.2 km/s, what would it be on a planet with double the mass and double the radius of Earth?
- If three resistors of 2 Ohms, 3 Ohms, and 5 Ohms are connected in series, what is the current through the 3 Ohm resistor when connected to a 20V battery?