Physics Quiz: Refraction and Lenses

Question 1: What is refraction of light?

• The reflection of light off a surface

• The bending of light as it passes from one medium to another.

• The emission of light from a source

• The absorption of light by a medium

Question 2: Give an example of refraction of light in everyday life.

• Bouncing ball

• Cooking on a gas stove

• Straw in a glass of water

• Reading a book

Question 3: What happens to the speed of light when it enters a different medium?

• It changes

• It becomes faster

• It becomes invisible

• It stops completely

Question 4: Define the term 'angle of refraction'.

• The angle of refraction is the angle between the refracted ray and the normal to the surface at the point of incidence.

• The angle of refraction is the angle between the reflected ray and the normal to the surface at the point of incidence.

• The angle of refraction is the angle between the refracted ray and the surface at the point of incidence.

• The angle of refraction is the angle between the incident ray and the normal to the surface at the point of reflection.

Question 5: How does the bending of light occur during refraction?

• The bending of light is caused by the rotation of the Earth.

• The bending of light occurs due to the gravitational pull of the Earth.

• Light bends because of the temperature of the medium it is passing through.

• The speed of light changes as it passes from one medium to another, causing it to bend.

Question 6: What is a convex lens?

• A lens that is thicker in the middle and thinner at the edges.

• A lens that is flat and has no curvature.

• A lens that is thinner in the middle and thicker at the edges.

• A lens that does not refract light.

Question 7: How does a convex lens bend light rays?

• By reflecting them away from a central point

• By absorbing them and creating a shadow

• By refracting them towards a central point

• By allowing them to pass through without any change

Question 8: Explain how a convex lens can be used to form a magnified image.

• By dispersing the light rays to create a smaller and inverted image.

• By blocking the light rays to prevent the formation of any image.

• By reflecting the light rays to produce a blurry and distorted image.

• By focusing the light rays to converge at a single point, creating an enlarged and upright image.