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 8
Define refractive index.
Describe what happens to the direction of light when it passes from water into air at an angle.
Describe what is meant by 'optically denser medium'.
Explain why a fish in water appears closer to the surface than it actually is.
Explain why a fish in water appears closer to the surface than it actually is.
Explain why refraction does not occur if light hits the boundary at 90° to the surface.
Explain why the bottom of a swimming pool appears to be raised.
If the angle of incidence is 60° and the refractive index of the first medium is 1.0 and the second is 1.5, what is the angle of refraction (to the nearest degree)?
The refractive index of water is approximately: (1) 1.0 (2) 1.33 (3) 1.5 (4) 2.0
Which of the following is NOT a consequence of refraction?
(1) Twinkling of stars
(2) Formation of mirages
(3) Formation of shadows
(4) Bending of a pencil in water
Which of the following is NOT an example of refraction?
(1) A straw appearing bent in water
(2) A rainbow forming in the sky
(3) A shadow forming on the ground
(4) A lens focusing light
Which of the following is the correct definition of the angle of refraction?
(1) The angle between the incident ray and the normal
(2) The angle between the refracted ray and the normal
(3) The angle between the incident ray and the surface
(4) The angle between the refracted ray and the surface
The angle between the incident ray and the normal is called the ________.
The angle of refraction is measured from the ______ to the refracted ray.
The bending of light at the interface of two media is due to a change in ______ of light.
The normal is a line drawn ______ to the surface at the point of incidence.
True or False: Refraction can occur only when light passes from one medium to another with a different optical density.
True or False: The angle of incidence is always equal to the angle of refraction.
True or False: The direction of bending of light depends on whether it is entering a denser or rarer medium.
True or False: The greater the difference in refractive indices of two media, the greater the bending of light at the boundary.
