Dentists used it to check for weakenings in the teeth, and doctors use it to look at

broken bones. Although X-rays are very helpful they can be harmful too. If you're over

exposed to them they can deteriorate your cells and cause cancer.

Infrared rays help us detect heat. With special equipment, you are able to take

pictures. Infrared rays aren't seeable by the naked eye. It is also used to heat food.

Remote controls used infrared rays to change the TV chan

Some common words found in the essay are:
, infrared rays, cause cancer, gamma rays, short wave radiation, heat food, wave radiation, visible light, short wave, radio waves,
Approximate Word count = 371
Approximate Pages = 1 (250 words per page double spaced)