Radiation
Radiation is the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body. Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. There are two main types of radiation: nonionizing and ionizing. Light, radio, and microwaves are types of radiation that are called nonionizing. Ionizing radiation is a form of energy that acts by removing electrons from atoms and molecules of materials that include air, water, and living tissue. Most ionizing radiation originates from radioactive materials and space. Ionizing radiation is produced by unstable atoms.
Electromagnetic radiation
Electromagnetic waves are produced by the motion of electrically charged particles. These waves are also called electromagnetic radiation. because they radiate from the electrically charged particles. Electromagnetic radiation can have a variety of properties, depending on its wavelength.

X-rays
X-rays are a form of electromagnetic radiation. One of the most common and beneficial uses of X-rays is for medical imaging. A very high radiation dose over a short period of time causes radiation sickness, while lower doses can give an increased risk of radiation-induced cancer.
Gamma-rays
Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions.
Particle radiation
Particle radiation is around us all the time but it is harder to notice than wave radiation. The most common type of particle radiation comes from radioactive atoms. There are two main types of radioactive particles alpha () and beta (). Gamma ( ) is also given out by radioactive atoms but it is a wave and part of the electromagnetic (EM) spectrum. Particle radiation can be emitted by an unstable atomic nucleus (via radioactive decay), or it can be the product from some other kind of nuclear reaction.
Neutron radiation
Neutron radiation is a form of ionizing radiation that presents as free neutrons. This radiation most often found in nuclear reactors and nuclear bombs. It is composed of neutrons, neutral subatomic particles that make up the nucleus of atoms along with pro-to-sn

Cell phone Radiation
The type of radiation emitted from mobile phones is electromagnetic radiation. Cell phone radiation doses are considered to be very small as the emissions are low power. Many scientific studies have investigated possible health symptoms of Cell phone. Do not keep it near your body at night such as under the pillow or on a bedside table and avoid using your phone on low battery.

Radiation therapy
and side effects

Radiation therapy (also called radiotherapy) is one of the most common treatments for cancer. High doses of radiation to kill cancer cells and shrink tumours. But Radiation therapy can also damage normal cells and leading to side effects. Such as Skin problems, dryness, itching, Blistering, peeling or skin damage.