It sounds fast, but Hertz are slow. One Kilohertz (KHz) is 1,000 cycles a second or 60,000 bpm; one Megahertz (MHz) is 1,000 times that; and one Gigahertz (GHz) is 1,000 times that. Far too fast ...

Frequency is measured in Hertz, which is abbreviated Hz ... so 300,000,000,000 Hz would typically be written 300 GHz. Different frequencies have different natural properties.

This page accompanies the Lightspeed activity guide. For help with working out averages (or means), take a look at either Skillswise or Bitesize. Once you have an average for the distance between ...

The unit of frequency is the hertz (Hz). 1 Hz is one wave per second. It is common for kilohertz (kHz), megahertz (MHz) and gigahertz (GHz) to be used when waves have very high frequencies.