The Writing was written by: Md. Raisul Islam Milu
Date:07-03-2010
Signature:
What Is Radiation?
Radiation is a great problem in the world. In physics, radiation describes any process in which energy emitted by one body travels through a medium or through space, ultimately to be absorbed by another body. Non-physicists often associate the word with ionizing radiation. Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called no ionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles in matter. Ionizing radiation is produced by unstable atoms. Unstable atoms differ from stable atoms because unstable atoms have an excess of energy or mass or both. Radiation can also be produced by high-voltage devices (x-ray).
Atoms with unstable nuclei are said to be radioactive. In order to reach stability, these atoms give off, or emit, the excess energy or mass. These emissions are called radiation. The kinds of radiation are electromagnetic (like light) and particulate. Gamma radiation and x rays are examples of electromagnetic radiation. Gamma radiation originates in the nucleus while x rays come from the electronic part of the atom. Beta and alpha radiation are examples of particulate radiation. Interestingly, there is a "background" of natural radiation everywhere in our environment. It comes from space and from naturally occurring radioactive materials contained in the earth and in living things.
Date:07-03-2010
Signature:
What Is Radiation?
Radiation is a great problem in the world. In physics, radiation describes any process in which energy emitted by one body travels through a medium or through space, ultimately to be absorbed by another body. Non-physicists often associate the word with ionizing radiation. Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called no ionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles in matter. Ionizing radiation is produced by unstable atoms. Unstable atoms differ from stable atoms because unstable atoms have an excess of energy or mass or both. Radiation can also be produced by high-voltage devices (x-ray).
Atoms with unstable nuclei are said to be radioactive. In order to reach stability, these atoms give off, or emit, the excess energy or mass. These emissions are called radiation. The kinds of radiation are electromagnetic (like light) and particulate. Gamma radiation and x rays are examples of electromagnetic radiation. Gamma radiation originates in the nucleus while x rays come from the electronic part of the atom. Beta and alpha radiation are examples of particulate radiation. Interestingly, there is a "background" of natural radiation everywhere in our environment. It comes from space and from naturally occurring radioactive materials contained in the earth and in living things.
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