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Shared properties of electromagnetic waves
Electromagnetic waves are grouped according to their wavelength and frequency.
Electromagnetic waves are transverse waves and can travel through a vacuum.
Give one other property that is the same for all types of electromagnetic wave.
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Marking points
- 1 Gives one accepted shared property beyond being transverse and travelling through a vacuum: same speed in a vacuum/air, energy transfer, reflection, or refraction.
Full-mark answer
All types of electromagnetic wave travel at the same speed in a vacuum.
Why this answer loses marks
They can travel through air.
The official marking guidance says to ignore this statement; give a credited shared property such as equal speed in a vacuum, energy transfer, reflection, or refraction.