light and the electromagnetic spectrum. what kind of wave is light and what vibrates to make it?...
Post on 17-Jan-2016
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Light and the
Electromagnetic Spectrum
What Kind of Wave Is Light and What Vibrates to Make It?
• When an electric charge vibrates, the electric field around it changes, creating a changing magnetic field.
http://www.youtube.com/watch?feature=player_detailpage&v=hajIIGHPeuU
• When a magnet moves, the magnetic field around it changes, creating a changing electric field.
• The magnetic and electric fields create each other again and again.
An EM wave travels in all directions.
So…. what kind of wave is light?
What is Light Made of And How do We Know?
Two Theories1. Waves
2. Particles
Photons!!
Double Slit Experiment – Thomas Young 1803
What Types of Light Are There?
The Electromagnetic Spectrum
RedOrangeYellowGreenBlueIndigoViolet
ROY G BIV
How to Remember Order of Visible Light?
What Does Light Have To Do With Astronomy?
Age? Composition?
• Neon
• Argon
• Helium
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