What causes radiation?

The majority of background radiation occurs naturally from minerals and a small fraction comes from man-made elements. For example, a nuclear blast or naturally occurring radioactive minerals in the ground, soil, and water produce background radiation.

Explanation:

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It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects

passing a magnet thought the

mixture , because iron gets attracted to magnet .