Visible light has a frequency of approximately 5.0 × 10^14 Hz.
M and N are two other types of electromagnetic radiation.
The frequency of M is 5.0 × 10^6 Hz.
The frequency of N is 5.0 × 10^15 Hz.
Which types of radiation are M and N?
The diagram represents the electromagnetic spectrum.
Some regions have been labelled, and some labels are missing.
Which region should be labelled as infra-red waves?