No they don't and if you happen to be pregnant and you are sitting at your computer and you notice that your baby is moving around as if it's uncomfortable it is NOT the computer. It's just the way you are positioned. Sadly, and god bless you if this happens, your wife or you have a miscarriage it wasn't the computers fault. The amount of birth defects (3%) and miscarriages (15%) has always been the same.
All cell phones give off varying degrees of radiation.
Radiation
Yes, fire gives off radiation in the form of heat and light.
All objects give off thermal radiation.
Yes - infrared radiation. If you're asking about nuclear radiation, then no.
Yes, the Earth does give off radiation in the form of heat. This radiation is primarily in the form of thermal infrared radiation emitted by the Earth's surface in response to solar energy absorbed during the day.
Microwaves emit electromagnetic radiation in the form of microwaves when they are turned on. This radiation is absorbed by food and causes water molecules in the food to vibrate, generating heat that cooks the food.
No, fans do not give off radiation. Fans simply move air around to create a cooling effect by increasing air circulation. They do not emit any harmful radiation.
you have to use a radiation machine
A 'ray' is a term for a radiation. All objects with temperatures above 0 degrees Kelvin give off radiation called, "Heat".
Electromagnetic radiation.
they are magnetic