What do we call the group of waves of which visible light is a member?
The magnoelectric spectrum
The electromagnetic spectrum
The magneticelectro spectrum
What property has the same value for all members of the e-m spectrum?
Speed
Wavelength
Frequency
What is the speed of light in a vacuum?
\[200\, 000\, 000\, m\, s^{-1}\]
\[340 m\, s^{-1}\]
\[300\, 000\, 000\, m\, s^{-1}\]
What type of wave has a possible wavelength between \(1 m\) and \(1 km\)?
Radio and TV waves
Ultraviolet waves
Microwaves
Which of the following is a detector for radiowaves?
Aerials
Blackened thermometers
Photographic film
Which of the following is a detector for infrared waves?
What is a possible source for ultraviolet waves?
The sun
Fast electrons hitting a metal target
Radioactive decay
What is a possible use for gamma rays?
Remote controls
Communication
Medical tracers
What is a possible danger of overexposure from radiowaves?
Nothing, it's safe
Burning
Skin cancer
What is a possible danger of overexposure from x-rays?
Cell mutation