The Sun Sentinel states that microwaves come from several sources, such as speed camera devices, microwave ovens and outer space. Cell phones also generate microwaves with a transmitter chip.
Speed camera devices, usually stationed on roadways, send out microwave pulses that hit an object and then echo back to the device. The length of time it takes for the echo to return to the device shows how far away the object was and how fast it was traveling.
In medicine, microwaves are known for their treatment of cancer. Manufacturing plants use microwaves to generate heat to seal the lids of certain products. Microwaves are even found in homes across the globe. Microwave ovens use microwaves to heat food quickly.
Microwaves also come from the cosmos. The Sun Sentinel explains that in 1965, scientists detected microwaves coming from outer space. This confirmed the Big Bang Theory for many, because within that theory, when the universe was created all matter was extremely hot and cooled over time. As of July 2014, the temperature of the matter allows it to radiate microwaves out into space.
The MIT Technology Review studies the effects of cell phone microwaves on human health. Some researchers have found that the long neurons present in the human body are ideal attractors of microwave photons emitted by cell phones. These microwave photons are believed to cause side effects such as insomnia and headache.Learn More
Sparking in microwave ovens is usually caused by exposed metal. Even a small piece of metal such as a staple from a food bag or steel wool left after cleaning can cause sparks. In addition, parts of the microwave itself can cause sparking if the paint inside chips or peels.Full Answer >
Aluminum comes from several sources; it rarely occurs in pure form in nature, and is most frequently found embedded in other minerals, primarily bauxite. Bauxite and aluminum bear many physical characteristics; bauxite is comprised primarily of aluminum oxides, but has a slightly different shape and color. Aluminum and its companion metals and minerals are found in the Earth’s crust.Full Answer >
Titanium comes from several sources, including deposits in Australia, North America, the Middle East and South Africa. Titanium occurs on its own in large reserves located below the surface of the Earth. However, it is also frequently found embedded in other minerals, such as ilmenite and rutile.Full Answer >
When used correctly, microwaves are not directly dangerous to humans; however, microwaves can cause indirect harm when cooking certain foods. The FDA limits the amount of microwave radiation that can be emitted from the household appliance to 5 milliwatts of radiation. This lies far below the danger level to humans.Full Answer >