دانلود رایگان پاورپوینت امواج الکترومغناطیسی (انگلیسی)

Electromagnetic Waves
Recall Electromagnetism?
Properties of EM waves
Speed of EM waves
Energy Transfer
Particle-Wave Duality of EM Waves
Particles as Waves
The Electromagnetic Spectrum
Radio Waves
Microwaves
Infrared Waves
Visible Light
Ultraviolet Waves
X-Rays
Gamma Rays
Radio Communication
Broadcasting Radio Waves
Digital Revolution
Transceivers

The Ozone Layer
Ozone is a molecule composed of 3 oxygen atoms (O3)
Earth’s atmosphere has a layer of ozone that absorbs a lot of harmful UV rays
Humans have damaged the ozone layer with chemicals called chlorofluorocarbons (CFCs)
UV rays interact with CFCs by breaking a chlorine atom off of the molecule
The chlorine atom breaks an oxygen off of the ozone molecule, creating chlorine monoxide and oxygen
The chlorine monoxide then gives up the oxygen atom to a free oxygen atom, and is once again free to break apart a new ozone molecule
The cycle continues
The process results in the ozone layer becoming depleted and less able to absorb harmful UV radiation