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2.10 - The Wave Model of Light
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2.10 The Wave Model of Light
Waves
What all those machines have in common?
Waves
Invisible Spectrum
We call call the forms of Invisible radiation:
- ELECTROMAGNETIC RADIATION
Invisible Spectrum
The Electromagnetic Spectrum includes the VISIBLE LIGHT and the other waves, like:
- X-ray;
- Infrared
- Ultraviolet
Properties of Light
We have seen 5 properties of light this Quarter, do you remember then?
Properties
Wave Model
In this model we Assume 3 things
Wave Model
Different Colours
All Colours have the same length?
Different Colours
https://phet.colorado.edu/sims/html/waves-intro/latest/waves-intro_en.html
- The colour spectrum extends to Red to Violet.
- The wavelenght changes according to the Colour.
- The range is 700nm to 400nm
- 1nm = 0,000.000.001 mt = 10x^-9
Visible and Electromagnetic
Imagine these situations...
They can
happen by
the effect of something visible?
Invisible Spectrum
- We can see the light because our eyes have receptors to "sense" these colours.
- We also can sense the effects of light by the heat, but we can see the its radiation..
Electromagnetic
Radiation
Experiment
Experiment
Go outside! Put a Sunscreen in one area and tell me the result...
Obs.: That would be the best experiment of the Quarter but is impossible to do -_-