Electromagnetic waves travel at 300,000,000 metres per second (m/s) through a vacuum. Often a phrase is used to help remember the order of the groups of the electromagnetic spectrum such as Roman ...

Many scientists believe that a type of electromagnetic wave known as “chorus” can knock these electrons ... bursts and compared them with thunderstorm data. Some lightning activity seemed correlated ...

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.