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 10
A student observes that a coin placed at the bottom of a glass of water appears to be raised. Explain this observation using the laws of refraction.
Describe what happens to the speed and direction of light as it passes from air into glass.
Explain what is meant by the term 'refractive index'.
Explain why a pencil appears bent when placed in a glass of water.
Explain why the bottom of a swimming pool appears shallower than its actual depth.
State the first law of refraction (Snell's Law) in your own words.
A student observes that a coin placed at the bottom of a glass of water appears to be raised. Explain this observation using the laws of refraction.
Explain why the bottom of a swimming pool appears shallower than its actual depth.
Which of the following best describes the second law of refraction (Snell's Law)?
(1) The angle of incidence is always equal to the angle of refraction.
(2) The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media.
(3) The incident ray and refracted ray are always perpendicular.
(4) Light does not change direction when passing from one medium to another.
Which of the following is a correct statement about the laws of refraction?
(1) The incident ray and refracted ray are always parallel.
(2) The incident ray, refracted ray, and normal all lie in the same plane.
(3) The angle of incidence is always greater than the angle of refraction.
(4) The refractive index is always less than 1.
Which of the following is NOT a consequence of the laws of refraction?
(1) Bending of light at the interface
(2) Formation of mirages
(3) Reflection of light
(4) Apparent depth of water
Which of the following is NOT required for refraction to occur?
(1) Two different media
(2) A boundary between the media
(3) Light incident at an angle other than 0°
(4) A reflective surface
Fill in the blank: The angle between the incident ray and the normal is called the angle of _______.
Fill in the blank: The normal is a line drawn _______ to the surface at the point of incidence.
Fill in the blank: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is called the _______ of the second medium with respect to the first.
Fill in the blank: The refractive index (n) of a medium is defined as the ratio of the speed of light in _______ to the speed of light in that medium.
True or False: Refraction can occur when light travels along the normal to the surface.
True or False: The angle of refraction is always less than the angle of incidence when light passes from a rarer to a denser medium.
True or False: The laws of refraction apply only to visible light.
True or False: The path of light is reversible according to the laws of refraction.
