The highest energy electromagnetic waves (or photons) are gamma rays. Their energies range from millions of electron volts (MeV) to thousands of electron volts (keV), thus their wavelengths are very short (10-11
m to 10-13
Gamma rays are caused by radioactive decay and also produced by nuclear fusion. Some unstable nuclei emit gamma rays during decay. They are even more energetic than X-rays and can pass through concrete and metals. They are very dangerous, because they are capable of killing living cells, especially during the high energy of nuclear reactions. An example of such a reaction is the explosion of a nuclear bomb.
Many nuclear reactions and interactions result in the emission of gamma rays. People take advantage of these interactions for medicinal purposes, especially in cancer treatments, where focused gamma rays can be used to eliminate malignant cells.
There is another type of radiation more energetic gamma rays. This radiation is known as cosmic radiation
. It consists mostly of charged particles and some gamma rays. Their source is from outerspace and are booming our earthatmosphere.
[an error occurred while processing this directive]