Which is not a property of an electromagnetic wave?
They travel at the speed of light in a vacuum
They are longitudinal
They transfer energy from one place to another
What is different for each type of wave in the electromagnetic spectrum?
Speed
Frequency
Ability to travel through a vacuum
Which of these is a practical use for X-rays?
A policeman communicating with a fellow officer
A dentist obtaining an image of the root of a tooth
A physiotherapist treating a strained leg muscle with a special lamp
Which of these is not an electromagnetic wave?
Ultrasound
Ultraviolet
Infrared
Which of these types of wave has the highest frequency?
Radio waves
Visible light
Which electromagnetic wave is used in satellite communication?
Microwaves
Which electromagnetic wave is not used for medical imaging?
X-rays
Gamma rays
Which of these electromagnetic waves is a form of ionising radiation?
Which type of electromagnetic radiation causes suntan?
White light can be split up to form a spectrum using a prism. This is called dispersion. Which statement about dispersion is false?
The shorter the wavelength of the light, the more it is refracted.
Red light is refracted less than violet light.
The prism gives white light 7 different colours.