Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Properties of Waves
122 practice questions
Topics covered
Practice questions
91–100 of 122
Question 91
2 marks · Easy
Answer and see the solution →(a)[1 mark]Give one example of a wave that can be reflected, and one example of a wave that can be refracted.
(b)[1 mark]State what is always true about all types of waves when they are reflected or refracted.
Question 92
4 marks · Normal
Answer and see the solution →The diagram below shows a wavefront striking a flat barrier at an angle.
Wavefronts and barrier with normal (a)[1 mark]Mark and label the angle of incidence on the diagram.
(b)[1 mark]State the law of reflection.
(c)[1 mark]If the angle of incidence is , what is the angle of reflection?
(d)[1 mark]Explain why the reflected wave leaves the barrier at this angle.
Question 93
2 marks · Normal
Answer and see the solution →Water waves pass from deep to shallow water. Describe what happens to the direction and speed of the waves. Explain briefly.
Question 94
1 mark · Normal
Answer and check →Which statement best describes refraction of light?
- A.Light bounces off a surface at the same angle it strikes.
- B.Light passes through a boundary and bends due to a change in speed.
- C.Light is absorbed and converted to heat.
- D.Light travels without changing direction.
Question 95
2 marks · Normal
Answer and see the solution →Describe one example, other than light, where refraction occurs, and explain why refraction takes place.
Question 96
4 marks · Normal
Answer and see the solution →A student shining a light ray into water measures the following angles for different boundaries:
Angles measured by the student Boundary Angle of Incidence Angle of Refraction Air-water 40° 28° Water-glass 30° 22° (a)[2 marks]For the air-water boundary, is the light bending towards or away from the normal? Explain.
(b)[2 marks]For the water-glass boundary, which medium is slower for light: water or glass? Justify your answer using the angles.
Question 97
2 marks · Normal
Answer and see the solution →State two scientific devices that use the refraction of light and briefly describe how refraction is useful in each.
Question 98
1 mark · Normal
Answer and check →What is always true when a wave is reflected from a flat barrier?
- A.The wave changes speed when reflected.
- B.The wave is refracted at the barrier.
- C.The angle of incidence equals the angle of reflection.
- D.The wave leaves the surface at right angles.
Question 99
1 mark · Easy
Answer and see the solution →State what is meant by the Doppler effect.
Question 100
2 marks · Easy
Answer and see the solution →A cyclist rings their bell while moving past a group of people standing on the pavement.
Describe how the sound of the bell changes as the cyclist moves towards, and then away from, the group.