Welcome to Physics is Phun Please take ONE grating from trays by doors as you come in

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

Periodic Table of the Elements

© 2000 ChemGlobe, periodictable@gmx.net

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!