Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
111–120 of 181 · Normal
Question 111
1 mark · Normal
Answer and check →Which of the following electromagnetic waves has the longest wavelength?
- A.Infrared
- B.X-rays
- C.Radio waves
- D.Ultraviolet
Question 112
2 marks · Normal
Answer and see the solution →State two properties that are shared by all waves in the electromagnetic spectrum.
Question 113
3 marks · Normal
Answer and see the solution →Fill in the missing boxes in the table to correctly order the following electromagnetic waves by increasing frequency. Start with the lowest frequency.
Order (1 = lowest frequency) Wave type 1 Radio waves 2 ? 3 Visible light 4 ? 5 Gamma rays Question 114
3 marks · Normal
Answer and see the solution →The wavelength of a red light wave is m. Calculate the frequency of this light.
(The speed of light in a vacuum is m/s.)
Question 115
2 marks · Normal
Answer and see the solution →Explain why gamma rays and X-rays are placed at the same end of the electromagnetic spectrum.
Question 116
4 marks · Normal
Answer and see the solution →The diagram below represents the electromagnetic spectrum, but some wave types are missing.
Some wave types have been omitted from the spectrum. Wave type Relative position (increasing frequency) Radio waves 1 - 2 Visible light 3 - 4 Gamma rays 5 (a)[1 mark]Name the wave type that should be in position 2.
(b)[1 mark]Name the wave type that should be in position 4.
(c)[1 mark]State whether the wavelength of the wave in position 2 is longer or shorter than that of visible light.
(d)[1 mark]State one use of the wave type in position 4.
Question 117
3 marks · Normal
Answer and see the solution →Describe how the frequency and wavelength change as you move from radio waves to gamma rays across the electromagnetic spectrum.
Question 118
4 marks · Normal
Answer and see the solution →A student reads that all electromagnetic waves can be reflected and refracted. They want to investigate this for light.
Describe a laboratory experiment the student could perform to demonstrate the reflection and refraction of visible light, mentioning the main pieces of apparatus required.
(a)[1 mark]State the apparatus the student would need.
(b)[1 mark]Describe the procedure for demonstrating reflection.
(c)[1 mark]Describe the procedure for demonstrating refraction.
(d)[1 mark]State one observation the student could make in either part.
Question 119
4 marks · Normal
Answer and see the solution →Microwaves are used in a variety of everyday applications.
(a)[2 marks]State two uses of microwaves, other than for cooking food.
(b)[2 marks]Explain why microwaves are suitable for the uses in part (a).
Question 120
3 marks · Normal
Answer and see the solution →Microwave ovens have metal screens on the doors.
(a)[2 marks]Explain why it is important for microwave ovens to have metal screens.
(b)[1 mark]Describe what could happen if a microwave oven did not have a metal screen.