This page deals with topics and concepts from chapter 7 of Chemistry by Zumdahl (6th edition)

Additional presentations, worksheets, quizzes, and information should be accessed on http://blendedschools.blackboard.net

   

This image is from the following website:  http://www.lbl.gov/MicroWorlds/ALSTool/EMSpec/EMSpec2.html

What the HECK is Light?

Relationships to know:     u = c/l   c = 2.98 x 10⁸ m/s (we'll just use 3 x 10⁸ m/s)     E = h u       h (Planck's constant) = 6.63 x 10^-34 Js

Examples:

Suppose a light wave has a frequency of 5.00 x 10¹⁵ Hz (cycles per second).  What is the wavelength?

            Since u = c/l  we can find the wavelength using this relationship.  u = 5.00 x 10¹⁵ 1/s and c = 3.00 x 10⁸ m/s so our

            problem becomes     5 x 10¹⁵ 1/s  = (3.00 x10⁸ m/s)/l  

                                       l = (3 x 10⁸ m/s)/ (5 x 10¹⁵ 1/s)      l = 6 x 10^-8 m or 60 nm.

Here's a useful, informative website regarding electromagnetic spectum: http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html

http://www.youtube.com/watch?v=kfS5Qn0wn2o&feature=related

Wave properties are demonstrated and discussed here:  http://ircamera.as.arizona.edu/NatSci102/NatSci102/lectures/light.htm

Atomic Emission and Light:   http://artsedge.kennedy-center.org/fireworks/index.html

This photo comes from:  http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/atspect3.html

Atomic Spectra:  Check out this site- http://www.colorado.edu/physics/2000/quantumzone/lines2.html

Quantum Mechanical videos:

Atomic Structure videos:

1) Atoms and the Periodic Table

2) Discovery of the Electron

3) Discovery of the Atomic Nucleus

4) The Existence of Quarks

5) The Standard Model of Particle Physics

6) The Nature of Forces

7) Gravity and Electromagnetism

8) The Unification of Electricity and Magnetism

9) The Strong and Weak Nuclear Forces

10) The Unified Theory of Force

11) The Weird Quantum World

12) QED- The Jewel of Physics