The electromagnetic spectrum
The electromagnetic spectrum is a continuous range of wavelengths. The types of Energy carried by particles from a radioactive substance, or spreading out from a source. that occur in different parts of the spectrum have different uses and dangers - depending on their wavelength and The number of waves produced each second. The unit of frequency is hertz (Hz)..
Refraction from a prism
The electromagnetic spectrum consists of a group of radiations that all travel at the speed of light (\(3\times 10^{8},m\,s^{-1}\)).
In the middle of the EM spectrum is the visible spectrum consisting of a range of different colours of light:
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet
There are many other parts of the EM spectrum that we cannot see.
The diagram below illustrates these parts.
Chart showing types of electromagnetic waves