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 12
A student observes that a coin at the bottom of a glass of water appears to be at a shallower depth than it actually is. Explain this observation using the laws of refraction.
Define the term 'refractive index' of a medium.
Describe what happens to the wavelength and frequency of light as it passes from air into glass.
Explain why a pencil appears bent when partially immersed in water.
Explain why the path of light is reversible according to the laws of refraction.
A student observes that a coin at the bottom of a glass of water appears to be at a shallower depth than it actually is. Explain this observation using the laws of refraction.
A student shines a laser beam from water (n = 1.33) into a block of acrylic (n = 1.49) at an angle of incidence of 40°. Calculate the angle of refraction in the acrylic. (Give your answer to two decimal places.)
Explain, with reference to the laws of refraction, why a swimming pool appears shallower than its actual depth when viewed from above.
Which of the following factors does NOT affect the refractive index of a medium?
(1) Wavelength of light
(2) Temperature
(3) Pressure
(4) Mass of the medium
Which of the following is NOT a consequence of the laws of refraction?
(1) Bending of light at the interface of two media
(2) Formation of mirages
(3) Reflection of light from a mirror
(4) Apparent depth of water
Which of the following is the correct mathematical expression for Snell's Law?
(1) n₁ sinθ₁ = n₂ sinθ₂
(2) n₁ cosθ₁ = n₂ cosθ₂
(3) n₁ tanθ₁ = n₂ tanθ₂
(4) n₁/θ₁ = n₂/θ₂
Which of the following pairs of media will cause the greatest bending of light?
(1) Air and water
(2) Air and glass
(3) Water and glass
(4) Air and diamond
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 _______.
Fill in the blank: The refractive index of vacuum is _______.
Fill in the blank: The speed of light in a medium is _______ than the speed of light in vacuum.
Fill in the blank: When light passes from a rarer to a denser medium, it bends _______ the normal.
Is it possible for the angle of refraction to be greater than the angle of incidence?
True or False: The laws of refraction apply only to visible light.
True or False: The refractive index of a medium is always greater than 1.
True or False: When light travels from a denser to a rarer medium, it bends away from the normal.
