Laws of Refraction
Physics ⇒ Light and Optics
Laws of Refraction starts at 8 and continues till grade 12.
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See sample questions for grade 11
A light ray enters a glass slab from air at an angle of 60°. If the refractive index of glass is 1.5, what is the angle of refraction? (Give your answer to two decimal places.)
A light ray passes from medium A (n = 1.6) to medium B (n = 1.2). If the angle of incidence is 40°, what is the angle of refraction? (Give your answer to two decimal places.)
A ray of light passes from air into a medium and bends towards the normal. What can you say about the refractive index of the medium compared to air?
A ray of light passes from air into a medium with a refractive index of 1.7. If the angle of incidence is 50°, what is the angle of refraction? (Give your answer to two decimal places.)
A ray of light passes from glass (n = 1.5) into water (n = 1.33) at an angle of incidence of 45°. Calculate the angle of refraction in water.
A ray of light passes from water (n = 1.33) into air (n = 1.00). If the angle of incidence in water is 45°, calculate the angle of refraction in air.
A student observes that a coin placed at the bottom of a beaker filled with water appears to be raised. Explain this observation.
Describe the relationship between the angle of incidence and the angle of refraction when light passes from a denser to a rarer medium.
Describe what happens to the path of a light ray when it passes from a denser to a rarer medium at an angle.
Explain why a pencil appears bent when placed in a glass of water.
Explain why the apparent depth of a swimming pool is less than its real depth.
If the angle of incidence is 0°, what will be the angle of refraction?
If the refractive index of a medium is 2, what is the speed of light in that medium? (Speed of light in vacuum = 3.0 × 10⁸ m/s)
If the refractive index of medium 1 is less than that of medium 2, how does the angle of refraction compare to the angle of incidence when light passes from medium 1 to medium 2?
If the refractive index of water is 1.33 and that of diamond is 2.42, which medium slows down light more?
State Snell's Law of Refraction.
The refractive index of glass is 1.5. If the speed of light in vacuum is 3.0 × 10⁸ m/s, what is the speed of light in glass?
When a ray of light passes from air (n = 1.00) into water (n = 1.33) at an angle of incidence of 30°, what is the angle of refraction? (Give your answer to two decimal places.)
