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WorksheetsElectromagnetic Waves - Multiple Choice Questions
Total questions: 17
Worksheet time: 9mins
Which of the following is true about all electromagnetic waves?
They require a medium to travel
They are longitudinal waves
They travel at the same speed in a vacuum
Their speed depends on their frequency
What is the speed of electromagnetic waves in a vacuum?
3×103 m/s
3×106 m/s
3×108 m/s
3 × 10^12 m/s
Which of the following waves has the longest wavelength?
Gamma rays
X-rays
Infrared
Radio waves
Which part of the electromagnetic spectrum has the highest energy?
Ultraviolet
Gamma rays
Visible light
Radio waves
Which type of electromagnetic wave is used in night vision cameras?
Infrared
Ultraviolet
X-rays
Microwaves
Which of the following is a property of X-rays?
They can be detected by the human eye
They have a longer wavelength than microwaves
They are absorbed by bones but pass through soft tissue
They travel slower than visible light
Which electromagnetic wave has a frequency just higher than visible light?
Infrared
Ultraviolet
Microwaves
Radio waves
Which electromagnetic waves are used for satellite communication?
Infrared
Microwaves
Gamma rays
Ultraviolet
Which type of electromagnetic wave is commonly used for sterilising medical equipment?
Ultraviolet
Infrared
Visible light
Microwaves
Which of the following is NOT a use of radio waves?
Broadcasting TV signals
Mobile phone communication
Treating cancer
FM radio transmission
Which of these electromagnetic waves is most likely to cause skin cancer?
Infrared
Ultraviolet
Microwaves
Radio waves
Which part of the electromagnetic spectrum is used in remote controls?
Microwaves
Infrared
Ultraviolet
X-rays
What happens to the wavelength of electromagnetic waves as frequency increases?
It stays the same
It increases
It decreases
It first increases, then decreases
Which electromagnetic wave is used in fibre optic communication?
Infrared
Visible light
Microwaves
X-rays
Why are gamma rays dangerous to humans?
They cause atoms to vibrate more
They ionise atoms, which can damage DNA
They only cause minor heating effects
They are absorbed by the skin without causing harm
Which electromagnetic wave is the least harmful to human tissue?
Gamma rays
X-rays
Radio waves
Ultraviolet
How can exposure to harmful electromagnetic waves be reduced?
By increasing the power of the waves
By reducing the distance from the source
By wearing protective shielding
By increasing exposure time
