Refractive Index

Physics ⇒ Light and Optics

Refractive Index starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Refractive Index. 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 11

A light ray enters from air into a medium at an angle of 45° and is refracted at 30°. What is the refractive index of the medium? (n_air = 1.00)

A ray of light passes from glass (n = 1.5) into water (n = 1.33). Will the ray bend towards or away from the normal?

A student measures the speed of light in a liquid to be 2.25 × 10⁸ m/s. What is the refractive index of the liquid? (Speed of light in vacuum = 3.00 × 10⁸ m/s)

Calculate the speed of light in a medium with a refractive index of 1.5. (Speed of light in vacuum = 3.0 × 10⁸ m/s)

Define absolute refractive index.

Describe how the refractive index changes with temperature for most liquids.

Explain the term 'relative refractive index'.

Explain why a pencil appears bent when placed in a glass of water.

Explain why the refractive index of a material is different for red and blue light.

If light passes from air (n = 1.00) into water (n = 1.33) at an angle of 30°, what is the angle of refraction? (Give your answer to two decimal places.)

If the refractive index of medium 1 with respect to medium 2 is 1.5, what is the refractive index of medium 2 with respect to medium 1?

If the refractive index of oil is 1.47 and that of water is 1.33, what is the refractive index of oil with respect to water?

If the speed of light in glass is 2.0 × 10⁸ m/s, calculate the refractive index of glass. (Speed of light in vacuum = 3.0 × 10⁸ m/s)

State Snell's Law in terms of refractive index.

The refractive index of diamond is about 2.42. What does this mean in terms of the speed of light in diamond compared to vacuum?

What is the refractive index of a medium?

A certain transparent material has a refractive index of 1.65 for blue light and 1.62 for red light. What phenomenon does this difference in refractive index illustrate?

A diamond is immersed in a liquid. The refractive index of diamond is 2.42 and that of the liquid is 1.50. Calculate the critical angle for total internal reflection at the diamond-liquid interface. (Give your answer to two decimal places.)

A light ray passes from medium X into medium Y. If the angle of incidence is 60° and the angle of refraction is 30°, calculate the refractive index of medium Y with respect to medium X.

A light ray travels from medium A (refractive index 1.60) into medium B (refractive index 1.20) at an incident angle of 40°. Calculate the angle of refraction in medium B. (Give your answer to two decimal places.)