Electromagnetic Waves - exam practice
Electromagnetic Waves
Question 1 of 10
This question is about the electromagnetic spectrum.
State one property that is the same for all electromagnetic waves.
A radio wave has a wavelength of 1.25 m and travels at a speed of 3 x 108 m/s.
State the equation linking wave speed, frequency and wavelength.
Calculate the frequency of the radio wave and give the correct unit.
This question is about the uses of electromagnetic waves.
Complete the diagram below by matching the electromagnetic wave to the correct use.
Describe one similarity and one difference between radio waves and gamma waves.
Which of the following is a hazard of gamma radiation?
This question is about the properties of electromagnetic waves.
Complete the list of electromagnetic waves in order of increasing frequency.
Radio
Infrared
Ultraviolet
Gamma
Which of the following is correct?
The speed of light in a vacuum is
Some electromagnetic waves can be harmful.
State the name of two types of electromagnetic wave that are harmful and give their harmful effect.
X-rays have been used in medical imaging for many years to see the internal structures of patient's bodies.
Explain why the doctor leaves the room but the patient is safe to have the X-ray.
The image below shows the patient's X-ray.
The X-ray film is initially white. When X-rays are absorbed by the film it turns black.
Explain why the bones appear white but other areas appear darker.
The frequency of the x-rays used is 2.5 x 1018 Hz. The speed of light is 3 x 108 m/s.
Calculate the wavelength of the x-ray used.
Remote control cars use radio waves to send signals from the controller to the car.
The table below summarises the operating frequency and wavelengths of 3 different cars.
Calculate the wavelength for car C.
The speed of light is 3 x 108 m/s.
Explain why it is safer to use radio waves to send signals instead of gamma waves.
Explain what happens when the aerial of the remote control car absorbs a radio wave.
This question is about electromagnetic waves.
The table below shows the different electromagnetic waves in order of wavelength and frequency.
Name the missing electromagnetic waves.
Describe one similarity and one difference between an electromagnetic wave and a sound wave.
Explain why microwaves are suitable for cooking food.
Thermal imaging cameras are used for detecting and visualising radiation emitted by objects and organisms. They are used in energy auditing, night vision, building inspection, firefighting and wildlife monitoring.
State the name of the part of the electromagnetic spectrum that is used for thermal imaging cameras.
Explain how infrared is suitable for use in thermal imaging cameras.
The table below shows the wavelengths of a UV wave, a radio wave and a visible light wave.
Complete the table to match the part of the spectrum to the wavelength.
Electromagnetic waves have many uses in industry. This question is about using gamma radiation in the medical industry.
State one use of gamma radiation in the medical industry.
Give one reason why gamma is suitable for the use stated above.
The gamma radiation used in one procedure has a frequency of 30 x 1018 Hz. The speed of light is 3 x 108 m/s.
Calculate the wavelength of the gamma radiation.
This question is about the use of electromagnetic waves for communication.
State which two parts of the electromagnetic spectrum are used for long range communication.
Microwaves travel at the speed of light, 3 x 108 m/s.
Calculate the frequency of the microwaves used for satellite communication if the wavelength is 1 mm.
This question is about the electromagnetic spectrum.
List the electromagnetic spectrum in order of increasing frequency.
State the equation linking wave speed, frequency and wavelength.
Explain what happens to the wavelength of electromagnetic waves as frequency increases.
Match the statement to correct description.