Year 10 Physics P3 Waves (Part 2)

If a ray of light hits a plane (flat) mirror, the angle of incidence of a light ray equals the angle of reflection.

• True
• False
• Don't know/Can't remember

Look at the diagram carefully. How are marks awarded for a good diagram? Tick all that apply

• A ruler is used for drawing straight lines
• The arrows on the light rays show the direction in which light is travelling
• The angles are labelled as i and r
• The light rays join where they meet the mirror
• Don't know/Can't remember

When drawing reflection diagrams, where the light hits the surface, a 90° line is drawn coming out of the mirror. What is this line called?

Describe the movement of the right ray as it enters the glass block.

• It moves towards the normal
• It moves way from the normal
• It travels straight through the glass block
• Don't know/Can't remember

Describe the movement of the right ray as it emerges from the glass block.

• It moves towards the normal
• It moves way from the normal
• It travels straight through the glass block
• Don't know/Can't remember

How can the bending (refraction) of light be best explained?

• The glass block is less dense and slows down the path of light
• The glass block is more dense and slows down the path of light
• The glass block is more dense and speeds up the path of light
• Don't know/Can't remember

If the angle of incidence is 40°, give a reasonable value for the angle of refraction

• 50°
• 30°
• 40°
• Don't know/Can't remember

The experiment below is designed to show how the angle of refraction changes when the angle of incidence is changed. What is/are the dependent variable(s)?

• Angle of incidence
• Angle of refraction
• Material of the block
• Size of the block
• Don't know/Can't remember

The experiment below is designed to show how the angle of refraction changes when the angle of incidence is changed. What is/are the controlled variable(s)?

• Angle of incidence
• Angle of refraction
• Material of the block
• Size of the block
• Don't know/Can't remember

If light travels from a less dense medium to a more dense medium (e.g. from air through glass), the angle of refraction is less than the angle of incidence (the refracted light bends towards the normal)

• True
• False
• Don't know/Can't remember