Alexandra

= Microwaves =

=What is electro magnetic radiation? =

= = =How do Microwaves use electro magnetic radiation?=


 * In a microwave oven the radio waves are generated to the frequency that can be taken in by food. Inside the metal box of microwaves there is a generator called the magnetron. The magnetron takes electricity from the power outlet and converts into high power. Microwaves heat by radiation. it has an invisible up and down pattern of electricity and magnetism. Microwaves have shorter wave lengths and frequencies. The microwaves that cook food in your oven are only 12 cm long but carry a huge amount of energy. Microwave radiation is measured as power density in units of milliwatts per square centimetre (mW/cm2) which is the rate of energy flow per unit area. **




 *  This is how a microwave works: Inside the microwave there is a generator called the magnetron. The magnetron takes electricity from the power outlet and converts it into high power 12 cm radio waves. Then it blasts these through the channel called wave guide. Then the molecules in food vibrate and it starts heating. **

= = = = = = = = = = = = = = =How do microwaves affect humans with their level of electro magnetic radiation? =

===Microwaves can affect the human body, due to the fact that it can heat the body tissue the same way it heats food. High levels of microwaves can cause painful burns. It is especially sensitive to the eye. For example, I make cupcakes and I put them in the microwave to heat and I would like to check if it's ready to be taken out. I put my face in and that's when the heat affects the eye. In unlikely events, it could cause cataracts. High levels of microwave energy can kill sperm. That's why in markets the microwaves should operate at limits set out by the government.They now put metal boxes that do not let out waves escape so it does not hurt a person that much. **You should always avoid putting plastic in the microwave as it releases toxic doses of BRSPHONAL A when heated in the microwave **=== = =
 * [[image:http://www.faqs.org/health/images/uchr_02_img0175.jpg width="148" height="250"]]
 * **As well as when you leave water in a glass container, it prevents bubbles from coming which cools it down. The water becomes super heated, past its boiling point. That's why we are all supposed to heat water the mi ****nimum time needed. **
 * **As well as when you leave water in a glass container, it prevents bubbles from coming which cools it down. The water becomes super heated, past its boiling point. That's why we are all supposed to heat water the mi ****nimum time needed. **
 * **As well as when you leave water in a glass container, it prevents bubbles from coming which cools it down. The water becomes super heated, past its boiling point. That's why we are all supposed to heat water the mi ****nimum time needed. **
 * ===**Sometimes the microwave doesn't cook food evenly. For example, if you want to cook raw meat in ****The microwave, some parts will cook and some will stay raw and it's very dangerous because meat has harmful bacteria. **===
 * =<span style="font-family: 'Comic Sans MS',cursive; font-size: 13px; margin: 0px; padding: 5px 0px 0px;">[[image:http://www.childrenshealthyfood.com/healthy-food-schools/pics/healthy-foods/fresh-fruit-and-vegetables.jpg width="250" height="82"]] =
 * = **<span style="font-family: 'Comic Sans MS',cursive; font-size: 13px;">Micro ovens can make changes to the properties of food. They can increase some parts of the food which isn't the most safe thing and they can decrease nutrition making the food contain bacteria. This problem only happens in small amounts but still it may turn into a big amount ** =

= =

<span style="font-family: 'Comic Sans MS',cursive; padding-left: 30px;"> These are a lot of examples of what happens to humans when microwaves start working.

<span style="font-family: 'Comic Sans MS',cursive; padding-left: 30px;">Sources

<span style="color: #333333; font-family: 'times new roman',times,serif; font-size: 12px; letter-spacing: 2px; line-height: normal; padding-left: 30px;">FDA,. //FDA publication// (November 12, 2008): n. pag. Web. 10 Apr 2011. <http://www.fda.gov/ForConsumers/ConsumerUpdates/ucm048953.htm>.

<span style="color: #333333; font-family: 'times new roman',times,serif; font-size: 12px; letter-spacing: 2px; line-height: normal;">(November 12, 2008): n. pag. Web. 10 Apr 2011. <http://www3.ntu.edu.sg/home/eylu/em/emspectrum.htm#radiowave

<span style="color: #333333; font-family: 'times new roman',times,serif; font-size: 12px; letter-spacing: 2px; line-height: normal;">"microwave safety systems." //microwavesafe// (2009): n. pag. Web. 10 Apr 2011. <http://www.microwavesafe.net/>.