Electromagnetic Radiation Test: Concepts & Practice Questions 2025/2026

Electromagnetic Radiation Test: Concepts &
Practice Questions 2025/2026
Electromagnetic radiation - ✔✔✔a range of electromagnetic waves consisting of oscillating
electric and magnetic fields travelling at the speed of light.



electromagnetic spectrum - ✔✔✔the range of frequencies of electromagnetic radiation, from
high-energy gamma rays to low energy radio waves.



electromagnetic wave - ✔✔✔transverse electric and magnetic fields positioned at right angles to
each other and travelling through empty space at the speed of light.



frequency - ✔✔✔the number of waves produced per second, measured in hertz (Hz).



gamma rays - ✔✔✔extremely high-energy electromagnetic radiation emitted by radioactive
materials.



infrared radiation - ✔✔✔a band of the electromagnetic spectrum with energies just below that of
visible light, detected by our skin as heat.



transverse waves - ✔✔✔a wave in which its particles vibrate at right angles to the direction of
motion of the wave itself.



microwaves - ✔✔✔electromagnetic radiation with wavelengths ranging from a fraction of a
millimetre to tens of centimetres, used in communication and cooking.



longitudinal wave - ✔✔✔a wave in which the particles travel in the sane direction as the
direction as that of the wave itself.



radio waves - ✔✔✔electromagnetic radiation with wavelengths ranging from hundreds of meters
to tens of centimetres, used in communication.