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 11
A ray of light 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 student observes that a coin placed at the bottom of a beaker filled with water appears to be raised. Explain this observation.
Describe the relationship between the angle of incidence and the angle of refraction when light passes from a denser to a rarer medium.
Describe what happens to the path of a light ray when it passes from a denser to a rarer medium at an angle.
Explain why a pencil appears bent when placed in a glass of water.
Explain why the apparent depth of a swimming pool is less than its real depth.
If the refractive index of medium 1 is less than that of medium 2, how does the angle of refraction compare to the angle of incidence when light passes from medium 1 to medium 2?
A student observes that a coin placed at the bottom of a beaker filled with water appears to be raised. Explain this observation.
Which of the following best describes the refractive index? (1) A measure of how much a material slows down light (2) The ratio of the speed of light in vacuum to that in the material (3) Both (1) and (2) (4) None of the above
Which of the following is NOT a consequence of the laws of refraction? (1) Bending of light at the interface (2) Change in wavelength of light (3) Change in frequency of light (4) Apparent depth of objects under water
Which of the following is NOT a law of refraction? (1) The incident ray, the refracted ray, and the normal all lie in the same plane. (2) The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. (3) The angle of incidence is always 90°. (4) The constant ratio is called the refractive index.
Which of the following is the correct formula for Snell's Law? (1) n₁ sinθ₂ = n₂ sinθ₁ (2) n₁ sinθ₁ = n₂ sinθ₂ (3) n₁/n₂ = sinθ₁/sinθ₂ (4) n₁ sinθ₁ = n₂/sinθ₂
Fill in the blank: According to Snell's Law, n₁ sinθ₁ = _________.
Fill in the blank: The bending of light as it passes from one medium to another is called __________.
Fill in the blank: The ratio of the speed of light in vacuum to the speed of light in a medium is called the __________ of the medium.
Fill in the blank: When light passes from a rarer to a denser medium, it bends __________ the normal.
True or False: The angle of incidence is always equal to the angle of refraction.
True or False: The frequency of light changes when it passes from one medium to another.
True or False: The laws of refraction apply only to visible light.
True or False: The path of a light ray is reversible according to the laws of refraction.
