Laws of Refraction
Physics ⇒ Light and Optics
Laws of Refraction starts at 8 and continues till grade 12.
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See sample questions for grade 9
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?
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.
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.
A light ray travels from medium A into medium B. The speed of light in medium A is 2.4 × 108 m/s and in medium B is 1.6 × 108 m/s. Calculate the refractive index of medium B with respect to medium A.
A ray of light is incident at an angle of 60° to the normal on a glass slab (n = 1.5) from air (n = 1.0). Calculate the angle of refraction to the nearest degree.
A ray of light passes from medium P (refractive index 1.4) into medium Q (refractive index 2.0). If the angle of incidence in medium P is 50°, calculate the angle of refraction in medium Q to the nearest degree.
The angle between the incident ray and the normal is called: (1) Angle of refraction (2) Angle of incidence (3) Angle of emergence (4) Angle of deviation
Which of the following has the highest refractive index? (1) Air (2) Water (3) Glass (4) Diamond
Which of the following is a correct statement about the refractive index? (1) It is always less than 1 (2) It is always equal to 1 (3) It is always greater than 1 for denser media (4) It has units of m/s
Which of the following is NOT an effect of refraction? (1) Twinkling of stars (2) Bending of a stick in water (3) Formation of a rainbow (4) Formation of shadows
Fill in the blank: The angle of refraction is measured between the refracted ray and the _______.
Fill in the blank: The normal is an imaginary line drawn _______ to the surface at the point of incidence.
Fill in the blank: The path of light bends when it passes from one medium to another due to a change in its _______.
Fill in the blank: The phenomenon of refraction is responsible for the apparent _______ of objects in water.
True or False: If the angle of incidence is 0°, the light ray will not bend at the boundary between two media.
True or False: Refraction can occur with sound waves as well as light waves.
True or False: The color of light affects its refractive index in a medium.
True or False: The direction of the refracted ray depends on the relative refractive indices of the two media.
