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Welcome to
Physics is Phun
Please take
ONE grating
from trays
by doors
as you
come in.
Pleasebe
Seated
The Atom
Physics is Phun
January 2008
The Elementsby Tom Lehrer
Animation by FlashimationMike Stanfill, Private Hand
2330 Jonesboro, Dallas, TX 75228
214-320-2293
www.privatehand.com
The Electromagnetic Spectrum
c = f c = speed of light
f = frequency
= wavelength
Duality of Light
Light as Waves
Light as particles – “photons”
Photons and thePhotoelectric Effect
E = h = photon energyh = Planck/s constant= photon or light frequency
Boiling Water Electrons in Metal
PhotonsWater Electrons
The Photoelectric Effect
Figure compliments of Kynningarvefur Eðlisfræðiskorar: http://erik.raunvis.hi.is/nam/
Atomic Structure1. Nucleus with
protons and neutrons
2. Electrons surround nucleus
3. Energy levels and the
Periodic Table of Elements
4. Electron transitions
Atomic andMolecular Spectra
1. The Hydrogen Balmer series2. Mercury vapor spectrum3. Cadmium vapor spectrum4. Sodium vapor spectrum5. Molecular Iodine
Hydrogen Atomic Energy Levels
Sodium spectrum
Fraunhofer Spectrum
Atomic Phenomena
1. Fluorescence
2. Phosphorescence
“delayed fluorescence”
Applications1. Lasers
2. Neon signs
3. Fluorescent lights
LightAmplification by
Stimulated Emission ofRadiation
Helium-Neon Laser
HeNe Laser Energy Level Diagram
HeNe Laser and LED Spectra
HeNe Laser RYBLight-Emitting
Diodes
We are on the web at
http://www.physics.umd.edu/lecdem/
Animated Gifs compliments of bellsnwhistles.com
The EndSee you in March!
