So there is radiation all around every one of us!!!
You can't escape it so you should probably just get on with your life. I mean cancer, it isn't really a big deal.
Honestly, the term radiation refers to light. By light, I mean electromagnetic radiation.
Science takes terms to a whole new meaning.
Lets observe the different types of electromagnetic radiation (ER)

As light's wavelengths get longer, its frequency gets smaller.
We can observe this through the equation on the right.
It reads frequency is equal to the speed of the light (a constant) over the wavelength.
This shows an inverse relationship between a frequency and wavelength of a wave.
So what about the different types of waves:
Radio-Infrared are generally weak long waves
Visible Light- include waves that human eyes have the ability to see
Ultraviolet-Gamma Rays are stronger and dangerous to human health. UV causes sunburn. X-rays and gamma rays are deadly with prolonged expose, but both have proven useful in the medical field.
Waves are all around us. You can't even see most of the waves surrounding you!
Keep posted for the next post: I'll go in depth with the relationship between particles and light waves. They are interconnected. This piece of knowledge explains so much about the universe. It will blow your mind.
Now for Chemistry Cat:
If you didn't get that now, you might get it after the next post...