The nuclei of the atoms in some elements are unstable and emit radiation. The radiation can be of three types - alpha radiation, beta radiation and gamma radiation.

The types of radiation that occur in different ... on their wavelength and frequency. The speed of electromagnetic waves in a vacuum is 3.0 × 10 8 m / s This is about 300,000,000 m/s (metres ...

The only thing that differentiates one type of electromagnetic radiation from any other is the energy carried by its photons. There's lots to discover in the electromagnetic spectrum. Here's a ...