Hey guys! How's it goin'? Oh me? I'm good! Just have the "It's Electric" song in my head! It is so catchy. Anyways, believe it or not this song as a teeny weeny bit to do with our upcoming topic! Let's get started!
Okay, so what do you think ES (Electromagnetic Spectrum) is?
Before you continue reading, post a comment of what you think and then after you read this, post another comment about what you learned...
And we're back! So the ES is: The range of wavelengths or frequencies over which electromagnetic radiation extends. Do you know how mechanical waves need a medium to move through? Well if not you do now. Anyways, electromagnetic waves don't need a medium to move through, in fact they can move through empty space!
There are several properties to the ES and some you may have already heard or know about. Below are the waves in longest to shortest wavelength. These waves are organized by how much energy each carries.
- Radio waves
- Microwaves
- Infra-red
- Visible Light
- Ultra-violet
- X-rays
- Gamma rays
Radio waves: It's has the lowest frequency but the longest wavelength. The radio waves have catagories just like the ES does. There are FM, AM, and TV waves. AM is low, TV high, and FM would be considered medium.
Microwaves: They are used in microwaves (duh) and airplane radars. They are also radio waves and heat up food in a cool way! They radiation from the microwave goes into your food and the water molecules in the food absorb the heat. This causes the heat to build up and warm-up your food!
Infra-red: These are used in remotes for tvs, cars, garage doors, and etc. When an object produces heat they are often produced, and sometimes you can feel them. These are also used to take pictures called Thermographs.
Visible Light Waves: Well obviously this is the light that you can see. Did you know that the colors of the rainbow (ROY G BIV) are actually arranged in order from lowest to highest energy? That's something I learned!
Ultra-violet waves: A lot of UV waves come from the sun and can cause bad things like cancer. :O
Thankfully though the ozone stops enough of the UV waves from getting to us and we are destroying it. (smh)
X-rays: You probably know what this one does if you have ever broken a bone, or your just an overachiever. *cough Fatima cough*
JUST KIDDING. Anyways, doctors only use a little bit of the X-rays to see through your bones. IF we didn't have calcium in our bones then the waves wouldn't stop and they wouldn't be able to see our bones.
Gamma Ray waves: Last but not least....well.... not in the energy. It has the shortest wavelength and the highest frequency. These waves are used in nuclear bombs. (AWH!*sad face*) These waves are absorbed by our atmosphere and a lot of them come from outer space. They can do good though, these waves can be used to destroy cancer cells! (YAY!)
Well, that's all! I hope you enjoyed my blog, see you next time!
TTYL (:
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