and the electromagnetic spectrum The Sun and the electromagnetic spectrum

Transverse wave properties

Electromagnetic Waves Are transverse waves consisting of changing electric fields and changing magnetic fields Produced when an electric charge vibrates or accelerates Do not require a medium to travel through – can travel through a vacuum or empty space Vary in wavelength and frequency

The Electromagnetc Spectrum Introduction to the EMS Electromagnetic Sun interacting with Comet

“Sunlight” Although the portion of sunlight we can see is visible light there is a spectrum of electromagnetic radiation emitted by the sun that reaches earth.

Radio emission from the sun Radio waves The longest wavelength of electromagnetic radiation. Radio emission from the sun http://www.youtube.com/watch?v=OzDmEA8x0nQ

Microwaves http://www.youtube.com/watch?v=UZeBzTI5Omk

Infrared radiation from the sun Infrared radiation is felt as heat and can be detected using infrared cameras and goggles. Infrared radiation from the sun http://www.youtube.com/watch?v=i8caGm9Fmh0&feature=relmfu

Image of the sun’s visible light The largest fraction of electromagnetic radiation from the sun is visible light. Image of the sun’s visible light http://www.youtube.com/watch?v=PMtC34pzKGc

UV radiation from the sun Ultraviolet (UV) Ultraviolet radiation are the wavelengths that cause sunburn and are the wavelengths absorbed by the ozone layer. UV radiation from the sun http://www.youtube.com/watch?v=QW5zeVy8aE0&feature=relmfu

X-rays X-rays are the wavelengths that are used in medical imaging. This image was taken using X-ray sensitive imaging devices and then converted into this image so that it has the appearance of an optical image. http://www.youtube.com/watch?v=CCAYcuCWOnM&feature=relmfu

Gamma Radiation Gamma radiation has medical applications. It is the highest energy, shortest wavelength of EM radiation. http://www.youtube.com/watch?v=TA5SLDiIUWs&feature=relmfu

Sun and Venus http://www.youtube.com/watch?v=jb6w1aQU_Qo

The Sun’s Energy Fusion – combining two lightweight nuclei (such as hydrogen in the sun) to form heavier nuclei

Fission: splitting a heavy atomic nuclei to form 2 lighter atomic nuclei

combustion http://www.youtube.com/watch?v=UygUcMkRy_c

http://www.youtube.com/watch?v=fSr3V498A3I http://www.youtube.com/watch?v=pusKlK1L5To