Quiz on the Topic Refraction of Light

Quiz on the topic refraction of light 1. What happens when light enters from a denser medium Into a less dense medium? a) It bends towards the normal b) It bends away from the normal c) It doesn't bend at all d) It is reflected back into the denser medium 2. Which of the following materials has the highest optical density? a) Air b) Water c) Glass d) Diamond 3. What is the refractive index of a medium? a) The speed of light in air divided by the speed of light in the medium b) The speed of light in the medium divided by the speed of light in air c) The ratio of the light's frequency in air and the medium d) None of the above 4. When light passes from water: to air, what happens to its direction? a) The light bends towards the normal b) The light bends away from the normal c) The light continues straight d) The light reflects back into the water 5. What is the critical angle? a) The angle of refraction b) The angle at which the light ray is reflected back into the denser medium c) The angle at which the angle of refraction becomes 90° d) The angle at which the ray bends the most 6. What does total internal reflection refer to? a) When light is absorbed by the medium b) When light bends away from the normal c) When light reflects back into the denser medium d) When light passes through the medium without bending 7. In which device is total Internal reflection used? a) Endoscope b) Microscope c) Telescope d) Binoculars 8. What happens when the angle of incidence exceeds the critical angle? a) The light refracts b) The light reflects c) The light stops d) The light passes through without bending 9. What happens to the speed of light when it passes from a medium with a refractive index of 2.5 to a medium with a refractive index of 1.5? a) The speed increases b) The speed decreases c) The speed remains the same d) The speed becomes zero 10. The critical angle of a medium is dependent on which of the following? a) The refractive index of the medium b) The angle of incidence c) The density of the medium d) The speed of light Answers 1. b) It bends away from the normal 2. d) Diamond 3. a) The speed of light in air divided by the speed of light in the medium 4. b) The light bends away from the normal 5. c) The angle at which the angle of refraction becomes 90° 6. c) When light reflects back into the denser medium 7. a) Endoscope 8. b) The light reflects 9. a) The speed increases 10. a) The refractive index of the medium