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Non-ionizing Radiation

Non-ionizing radiation contains low energy electromagnetic waves. Common examples of this kind of radiation are ultraviolet, visible light, infrared, microwave and radiowave. Their energy is relatively low, only manages to cause molecules to vibrate and induces heating effects.


Ultraviolet radiation of the sun is a kind of non-ionizing radiation

There are many applications of non-ionizing radiation in our daily life. Using microwaves to cook food and radiowaves to transmit information are examples.

We should beware of ultraviolet (UV) radiation. Although it is non-ionizing, exposure to it could cause harmful sunburns. During days with little clouds, we should take protective measures against exposure to UV radiation.

Another common example of non-ionizing radiation is ultrasound. It is a very high frequency sound wave and can be used to form ultrasound images for diagnostic treatment.

Summary of different types of radiation