Radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
What is radiation?
Radiation refers to the light energy that comes from a source such as sun. This radiation travels through space at the speed of light that has a wave like properties.
So we can conclude that radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
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