Understanding Light and Refraction

What is meant by refraction?

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

• The reflection of light off a surface

• The absorption of light by a material

• The scattering of light in all directions

What is a refracted ray?

• A ray of light that is absorbed by a material

• A ray of light that is reflected off a surface

• A ray of light that has changed direction due to refraction

• A ray of light that travels in a straight line

What is the angle of refraction?

• The angle between the incident ray and the normal

• The angle between the refracted ray and the normal

• The angle between the reflected ray and the surface

• The angle between the incident ray and the surface

What is the emerging ray?

• A ray of light that is absorbed by a material

• A ray of light that is reflected off a surface

• A ray of light that exits a medium after refraction

• A ray of light that travels in a straight line

How can you investigate the refraction of light using a rectangular glass block?

• By using a mirror to reflect light

• By using a ray box and measuring angles of incidence and refraction

• By using a magnifying glass to focus light

• By using a prism to separate light into colours

How can you investigate the refraction of light using a triangular glass prism?

• By using a mirror to reflect light

• By using a ray box and a screen to observe the visible spectrum

• By using a magnifying glass to focus light

• By using a rectangular glass block to measure angles

What is the visible spectrum?

• A range of sound frequencies

• A range of light colours visible to the human eye

• A range of temperatures

• A range of electrical frequencies

What happens to the speed of light when it passes from air to glass?

• It increases

• It decreases

• It remains the same

• It stops

What happens to a ray of light travelling along a normal when it enters glass?

• It bends towards the normal

• It bends away from the normal

• It continues in the same direction

• It is absorbed

What is the angle of refraction when a ray of light travels along a normal into glass?

• 90°

• 45°

• 0°

• 180°