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 10

Define absolute refractive index.

Describe how the refractive index changes with the wavelength of light.

Describe what happens to the path of light when it enters a medium with a lower refractive index from a higher refractive index at an angle.

Explain the term 'relative refractive index'.

A light ray enters a medium with a refractive index of 1.7 from air at an angle of 0° (normal incidence). What is the angle of refraction?

A light ray passes from air (n = 1.00) into a liquid and bends towards the normal. What can you say about the refractive index of the liquid?

A light ray passes from medium X (n = 1.6) to medium Y (n = 1.2). If the angle of incidence is 30°, calculate the angle of refraction. (sin^-1(0.75) ≈ 48.6°)

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?

The refractive index of water is approximately (1) 1.00 (2) 1.33 (3) 1.50 (4) 2.42

Which of the following has the highest refractive index? (1) Air (2) Water (3) Diamond (4) Glass

Which of the following is NOT a factor affecting the refractive index of a medium? (1) Temperature (2) Wavelength of light (3) Pressure (4) Mass of the observer

Which of the following is the correct formula for refractive index? (1) n = v / c (2) n = c / v (3) n = v × c (4) n = c + v

Fill in the blank: The refractive index (n) is given by the formula n = _________.

Fill in the blank: The refractive index of a medium is always ________ than or equal to 1.

Fill in the blank: The refractive index of vacuum is _________.

Fill in the blank: When light travels from a denser to a rarer medium, it bends ________ from the normal.

If the refractive index of a medium is less than 1, is this physically possible?

True or False: The refractive index has no units.

True or False: The refractive index of a medium can be less than 1 for some materials.

True or False: The refractive index of a medium depends on the color (wavelength) of light used.