Hospital equipment in Melbourne has been affected by "electromagnetic interference" after test runs of the new Metro Tunnel. What is it and can it be fixed?

There are seven groups of the electromagnetic spectrum. To the left of the electromagnetic spectrum are radio waves, the lowest frequency form of radiation with the longest wavelengths.

The reflected images are produced by electromagnetic light waves bouncing off of the mirrored surface, creating the common phenomenon called spatial reflection.

THz waves, located in the far-infrared region of the electromagnetic spectrum, can be used to perform non-invasive imaging through opaque materials for security and quality control applications.

Light waves, like all forms of electromagnetic radiation, moves in waves like water. An animation of a beam of white light being dispersed by a prism into various waves of colored light.

Researchers at ETH Zurich have managed to make sound waves travel only in one direction. In the future, this method could also be used in technical applications with electromagnetic waves.

Images produced using THz radiation are called 'hyperspectral' because the image consists of pixels, each one containing the electromagnetic signature of the object in that point.