Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
The Electromagnetic Spectrum
70 practice questions
Topics covered
Practice questions
11–20 of 37 · Normal
Question 11
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 12
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 13
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 14
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 15
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 16
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 17
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 18
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.
Question 19
4 marks · Normal
Answer and see the solution →Microwaves are used in mobile phones to carry signals.
(a)[2 marks]Describe one benefit and one risk of using microwaves in mobile phone technology.
(b)[1 mark]Suggest one way people can reduce the risk you described in part (a).
(c)[1 mark]Explain why mobile phone microwaves do not cook your brain.
Question 20
3 marks · Normal
Answer and see the solution →A company is designing a new microwave oven. They want to ensure it is both efficient and safe.
(a)[2 marks]Explain how microwaves heat food inside an oven.
(b)[1 mark]Describe one design feature that makes a microwave oven safe for users.