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 9
A light ray passes from air (n=1.0) into a liquid and the angle of incidence is 45°. If the angle of refraction is 30°, what is the refractive index of the liquid? (Give your answer to two decimal places.)
A light ray 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 medium A (n=1.2) to medium B (n=1.5). If the angle of incidence is 45°, calculate the angle of refraction to the nearest degree.
A ray of light passes from medium X to medium Y. If the angle of incidence is 40° and the angle of refraction is 25°, what is the refractive index of Y with respect to X? (Give your answer to two decimal places.)
A student shines a light ray from water (n=1.33) into air (n=1.0) at an angle of incidence of 20°. Calculate the angle of refraction to the nearest degree.
Describe how the refractive index of a medium can be determined experimentally.
Describe what happens to the direction of a light ray when it passes from water (n=1.33) to glass (n=1.5).
Describe what happens to the speed and wavelength of light as it enters a denser medium from a rarer medium.
Explain why a pencil appears bent when placed in a glass of water.
Explain why refraction does not occur if the light ray is incident along the normal.
Explain why the bottom of a swimming pool appears to be raised when viewed from above.
If light travels from glass (n=1.5) to air (n=1.0) and the angle of incidence is 30°, calculate the angle of refraction. (Give your answer to the nearest degree.)
If the angle of incidence is 30° and the angle of refraction is 20°, what is the ratio of sin i to sin r? (Give your answer to two decimal places.)
If the refractive index of medium 1 is 1.0 and medium 2 is 1.5, and the angle of incidence is 60°, what is the angle of refraction? (Give your answer to the nearest degree.)
If the speed of light in a medium is 2 × 10⁸ m/s, what is the refractive index of the medium? (Speed of light in vacuum = 3 × 10⁸ m/s)
State Snell's Law in words.
The refractive index of water is 1.33. What does this mean?
What is meant by the term 'optical density'?
What is the formula for Snell's Law?
What is the law of refraction also known as?
