Physics 5054 · O Level
Electromagnetic spectrum
38 practice questions on Electromagnetic spectrum, with worked solutions and instant marking.
Which section of the electromagnetic spectrum is used to send television signals from satellites?
May/June 2015
Microwaves are used for sending television signals to and from a satellite. Which statement about microwaves is correct?
May/June 2016
Fig. 6.1 shows several colours from the visible part of the electromagnetic spectrum: red, orange, yellow, green, blue.
May/June 2016
A wall poster of the electromagnetic spectrum is on display in a laboratory. One section of the electromagnetic spectrum has been torn off this wall poster by accident. Which part is missing?
May/June 2017
What kind of wave is used to transmit television signals to a satellite?
May/June 2017
Which kind of wave is used to transmit television signals to a satellite?
May/June 2017
Which of the following statements about electromagnetic waves is correct?
May/June 2018
A communications system employs microwaves that have a wavelength of $15\,$cm. The speed of light is $3.0 \times 10^8\,\text{m s}^{-1}$. What is the frequency of these microwaves?
May/June 2018
Which statement about blue light is right?
May/June 2018
A television remote control sends out an infra-red beam. Which statement concerning infra-red radiation is correct?
May/June 2018
The lists below show spectrum colours. Which list arranges them in order of rising frequency?
May/June 2019
A star gives off electromagnetic radiation over a spread of wavelengths. Fig. 4.1 shows how the brightness of the star’s radiation changes with wavelength. The radiation from the star is brightest at one wavelength.
May/June 2019
Which two waves form the electromagnetic spectrum?
May/June 2021
Which waves are excluded from the electromagnetic spectrum?
May/June 2022
Which row identifies a part of the electromagnetic spectrum with a wavelength longer than visible light and a part with a frequency greater than visible light?
May/June 2023
In which part of the electromagnetic spectrum is the Sun’s energy output greatest?
May/June 2023
Which parts of the electromagnetic spectrum are employed for communication between a remote controller and a television set, and between the Earth and a satellite?
May/June 2024
Which statement regarding infrared radiation is correct?
May/June 2024
The colour of visible light depends on its wavelength. Which list of colours is arranged in order of increasing wavelength?
May/June 2024
Which statement concerning red light and blue light is correct?
Oct/Nov 2015
Blue and yellow are colours in the visible spectrum. Of these two, which colour has the lower frequency, and which has the greater wavelength?
Oct/Nov 2016
Which two kinds of electromagnetic radiation are each used to destroy cancerous cells and to detect cracks in metals?
Oct/Nov 2016
A form of electromagnetic radiation has these characteristics: It has ionising properties. Its frequency is greater than the frequency of microwaves. It cannot be detected by the human eye. What is this radiation?
Oct/Nov 2017
The diagram presents the electromagnetic spectrum and names three components. The spectrum is arranged from longer wavelength to shorter wavelength. Which component of the spectrum is used in a sunbed to create a suntan?
Oct/Nov 2017
Fig. 10.1 shows the electromagnetic spectrum.
Oct/Nov 2017
Which of the following statements about radio waves is correct?
Oct/Nov 2018
In an experiment, the microwaves have a frequency of $3.0 \times 10^9\,\text{Hz}$. In air, their speed is $3.0 \times 10^8\,\text{m s}^{-1}$. Give one possible frequency and one possible speed in air for a radio wave?
Oct/Nov 2019
Fig. 4.1 shows the electromagnetic spectrum. The shaded band in the centre marks visible light. From left to right, the diagram labels are: gamma rays, X-rays, A, (visible light), B, C, radio waves.
Oct/Nov 2019
Different parts of the electromagnetic spectrum are used in applications. Which option correctly matches X-rays, ultraviolet light and microwaves with their applications?
Oct/Nov 2020
Which part of the electromagnetic spectrum is used to operate a television remote control?
Oct/Nov 2021
A satellite moves in orbit around the Earth at an altitude of $300\,\text{km}$ above the surface. The speed of electromagnetic waves is $3.0 \times 10^8\,\text{m s}^{-1}$. What is the least time for a radio signal sent from the Earth to arrive at the satellite?
Oct/Nov 2021
Several devices emit electromagnetic waves when they are in use. Which device emits electromagnetic waves with the greatest frequency?
Oct/Nov 2022
X-rays are transverse waves that belong to a spectrum of waves.
Oct/Nov 2022
Ultraviolet radiation forms part of the electromagnetic spectrum. Which application makes use of ultraviolet radiation?
Oct/Nov 2023
The Sun releases most of its energy across three parts of the electromagnetic spectrum.
Oct/Nov 2023
A student gives four claims about infrared waves. 1. They can be detected by the human eye. 2. They move at $330\,\text{m s}^{-1}$ in air. 3. They are transverse waves. 4. They are used in intruder alarms. Which of the statements are correct for infrared waves?
Oct/Nov 2024
Which two kinds of waves make up the electromagnetic spectrum?
Oct/Nov 2024
The microwave region forms one part of the electromagnetic spectrum. Fig. 5.1 shows the electromagnetic spectrum split into the seven main regions. At the left-hand end are gamma rays, and at the right-hand end are radio waves, with wavelength increasing from left to right.
Oct/Nov 2025