Refraction

What happens to light waves when they pass from one medium to another?

• They change colour

• They change direction

• They speed up without changing direction

• They disappear

Why do waves travel at different speeds in different materials?

• 
  Because of the height of the material

• 
  Because of the color of the material

• 
  Because of the temperature of the material

• 
  Because different materials have different densities

What happens to a wave as it passes into a more dense medium?

• 
  It stops

• 
  It slows down

• 
  It maintains its speed

• 
  It speeds up

If a wave hits the boundary between two materials at an angle, what occurs?

• 
  It will create a new wave

• 
  It will reflect back

• 
  It will be refracted

• 
  It will be absorbed

When light passes into a more dense medium, how does it bend?

• 
  Away from the normal

• 
  Towards the normal

• 
  In a circular pattern

• 
  It does not bend

What is the first step in drawing a ray diagram for refraction?

• 
  Drawing the normal

• 
  Drawing the emergent ray

• 
  Drawing the incident ray

• 
  Drawing the refracted ray

What happens to the wave as it passes from a more dense to a less dense medium?

• 
  It bends towards the normal

• 
  It bends away from the normal

• 
  It stops moving

• 
  It disappears

What remains constant when a wave changes speed due to refraction?

• 
  Frequency

• 
  Speed

• 
  Wavelength

• 
  Amplitude

If the speed of a wave increases, what else increases?

• 
  Frequency

• 
  Density of the medium

• 
  Wavelength

• 
  The angle of incidence

What happens when white light passes through a triangular prism?

• 
  It turns into a single color

• 
  It spreads out like a rainbow

• 
  It slows down

• 
  It speeds up