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 12

A light ray in air strikes a glass slab at an angle of 45°. If the refractive index of glass is 1.5, calculate the angle of refraction.

A light ray passes from medium A (n = 1.2) to medium B (n = 1.6) at an angle of incidence of 40°. Calculate the angle of refraction in medium B.

A light ray travels from medium X (n = 1.60) to medium Y (n = 1.20). Will the ray bend towards or away from the normal?

A ray of light passes from air (n = 1.00) into glass (n = 1.50). If the angle of incidence is 30°, use Snell's law to calculate the angle of refraction.

Describe the relationship between refractive index and optical density.

Describe what is meant by the term 'absolute refractive index'.

Explain the physical meaning of a refractive index greater than 1.

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

Explain why the refractive index of a medium is different for different wavelengths of light.

If the refractive index of a medium for red light is 1.50 and for violet light is 1.54, which color will bend more when passing through the medium?

If the refractive index of medium A with respect to medium B is 1.5, what is the refractive index of medium B with respect to medium A?

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 a medium is 2.25 × 10⁸ m/s, what is its refractive index? (Speed of light in vacuum = 3.00 × 10⁸ m/s)

State Snell's law in terms of refractive indices.

State two practical applications of refractive index in daily life or technology.

The refractive index (n) is given by the formula n = c/v, where c is the speed of light in vacuum and v is the speed of light in the medium. If c = 3.00 × 10⁸ m/s and v = 2.00 × 10⁸ m/s, what is the refractive index?

What is the refractive index of a medium?