Basically, there are two kinds of radiation: non-ionizing and ionizing. There are some who put sound waves as a third kind, also called acoustic radiation, but it needs a medium (something to move through) like solids, water, or air, to move through, so I will talk about it another day.
Non-ionizing radiation is a
low energy radiation that can move atoms and molecules but not break the bonds
between them. We see and use it every day. Visible light, infrared heat, radio
waves, and microwaves are common examples. There are part of the
electromagnetic spectrum. We can use light waves (the Sun), or heat waves to
keep us warm. Microwaves help us cook things quickly. They cause the molecules
to speed up, giving them heat energy. The thing to remember is that none of these
make something radioactive. There is nothing dangerous left over when they are
used. You could even use the Sun’s radiation to grow a plant or get a sun tan.
We couldn’t live without it.
Ionizing Radiation has so
much energy that it can break atoms apart. These include x-rays, gamma rays and
alpha and Beta particles. There are many good uses for these as long as we are
careful. X-rays (they use a very low setting) can help us see a broken bone
inside our body. It can be used to sterilize equipment. I can kill cancer that
cannot be reached with surgery. I is also used to create electricity. Aircraft
carriers and submarines now have nuclear reactors that heat up water into steam
to run turbine generators and make lots of electricity. Ionizing radiation can
be very dangerous if not used properly. That’s why you need to be very careful
and pay attention to warning signs. If you see this symbol, make sure and ask
an adult if the area is safe.
Love Papaw.
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