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WorksheetsWJEC Unit 3.5 Electromagnetic Spectrum
Total questions: 20
Worksheet time: 20mins
Electromagnetic waves vary in
the speed they travel in a vacuum.
wavelength and frequency.
the way they reflect.
the orientation of their electric and magnetic fields.
The visible light spectrum ranges between
radar waves and X-rays.
television waves and infrared rays.
infrared rays and ultraviolet rays.
ultraviolet rays and gamma rays.
X-ray photographs show softer tissue
as invisible.
as dark, highly exposed areas.
the same as dense bones.
as bright white areas.
1. What is a property of all electromagnetic waves?
They are deflected by magnets.
They are positively charged.
They travel at the speed of sound.
They travel through a vacuum.
Which type of electromagnetic radiation travels at the highest speed through a vacuum?
gamma ray
x-ray
radio waves
none of the above
State the magnitude of the speed of electromagnetic spectrum travel in a vacuum
4 x 10−8 m/s
3 x 10−8 m/s
4 x 108 m/s
3 x 108 m/s
Example Of Radio Waves? (check all that apply)
Cellphone
Heat Lamps.
Satellite communications
TV communications
Radar
Example Of Microwaves? (check all that apply)
Wireless networks
Heat Lamps.
Satellite communications
TV communications
Radar
Uses of infrared? (check all that apply)
Night vision goggles
Heat Lamps.
Satellite communications
TV remotes
Cause skin cancer
____ are the most dangerous and harmful electromagnetic waves due to having the highest frequency and energy.
X-rays
Gamma waves
Infrared waves
Ultraviolet
Which wave in the diagram has the longest wavelength?
1
2
3
4
Q. Which of the following has frequencies higher than ultraviolet rays?
X-Ray
Infrared Waves
Microwaves
Radiowaves
Hot objects give off this type of wave.
Gamma
UV
Radiowaves
Infrared
