Laws of Refraction

Physics ⇒ Light and Optics

Laws of Refraction starts at 8 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Laws of Refraction. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 8

Define refractive index.

Describe what happens to the direction of light when it passes from water into air at an angle.

Describe what is meant by 'optically denser medium'.

Explain why a fish in water appears closer to the surface than it actually is.

Explain why refraction does not occur if light hits the boundary at 90° to the surface.

Explain why the bottom of a swimming pool appears to be raised.

If the angle of incidence is 0°, what will be the angle of refraction?

If the angle of incidence is 30° and the angle of refraction is 20°, which medium is optically denser?

If the angle of incidence is 60° and the refractive index of the first medium is 1.0 and the second is 1.5, what is the angle of refraction (to the nearest degree)?

If the refractive index of a medium is 2, what is the speed of light in that medium? (Speed of light in vacuum = 3 x 10^8 m/s)

If the refractive index of medium 1 is 1.5 and medium 2 is 1.2, and the angle of incidence is 30°, calculate the angle of refraction (to the nearest degree).

If the refractive index of medium A is 1.6 and medium B is 1.2, and the angle of incidence in A is 40°, what is the angle of refraction in B (to the nearest degree)?

If the speed of light in a medium is 2 x 10^8 m/s, what is its refractive index? (Speed of light in vacuum = 3 x 10^8 m/s)

If the speed of light in a medium is 2.25 x 10^8 m/s, what is the refractive index of the medium? (Speed of light in vacuum = 3 x 10^8 m/s)

Light passes from air (n=1.0) into diamond (n=2.4) at an angle of incidence of 30°. Calculate the angle of refraction (to the nearest degree).

Light travels from glass (n=1.5) into air (n=1.0) at an angle of incidence of 45°. Calculate the angle of refraction (to the nearest degree).

State the law of refraction.

What happens to the speed of light as it enters a denser medium?

What is the law of refraction also known as?

When light passes from air into water, does it bend towards or away from the normal?