EM Waves
Sophie Azula
What kind of disturbance creates an EM wave?
An electromagnetic wave is created by vibration of charged particles. This type of wave also doesn't require a medium. Once formed, this energy travels at the speed of light until further interaction with matter.
The Electromagnetic Spectrum
What are two ways that EM waves are different from mechanical waves?
First, electromagnetic waves don't require a medium to pass through.This is different from mechanical waves, as they require a medium in order to exist. They also have their own electromagnetic spectrum, as their frequency is much different.
Radio
The lowest energy on the EM spectrum is a radio wave. Radios can send out communication signals or can play songs on your car radio.
Micro
Microwave radiation is the second to lowest energy on the EM spectrum and not only does it heat foods, it can also give astronomers insight into the structure of far away stars
Infrared
Infrared energy helps map dust in between stars, and it is used in night vision goggles. It has as medium wavelength compared to others on the EM spectrum.
Visible light
Waves that can be detected by our eyes are called visible light. A flashlight and Christmas lights both give off visible light.
Ultra-violet
Objects that may seem "hot" in space is likely giving off ultra-violet energy. This light doesn't only tan skin, it can burn it too.
X-ray
x-ray wavelengths are one of the highest on the EM scale, and give us the ability to see broken bones or bags in airport security.
Gamma Rays
Gamma Rays are the highest energy wave on the EM Scale, and doctors use them to to see your body, and they can help treat internal organs.
Works Cited
"The Electromagnetic and Visible Spectra." The Electromagnetic and Visible Spectra. N.p., n.d. Web. 04 Apr. 2016. <http://www.physicsclassroom.com/class/light/Lesson-2/The-Electromagnetic-and-Visible-Spectra>.
"The Electromagnetic Spectrum." YouTube. N.p., n.d. Web. 04 Apr. 2016. <https://youtu.be/m7c4-EO7ECE>.
"HubbleSite - Reference Desk - FAQs." HubbleSite - Reference Desk - FAQs. N.p., n.d. Web. 04 Apr. 2016. <http://hubblesite.org/reference_desk/faq/all.php.cat=light>.
"National Aeronautics and Space Administration." Electromagnetic Spectrum. N.p., n.d. Web. 04 Apr. 2016. <http://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html>.