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Light and Electrons Some wave-like and particle-like properties of light and some wave-like and particle-like properties of electrons are shown.
Quantum Chemistry
Scattering and Absorption of Light The effects of passing light through a colloidal suspension of milk in water and through a solution of copper sulfate are shown.
Colloids |
Physical Properties |
Liquids
Light as a Particle: Photoelectric Effect The discovery of the temperature dependence of the spectrum of an incandescent light source and the discovery of the photoelectric effect led to the characterization of the particle-like properties of light. Here we demonstrate these two phenomena.
Electrochemistry : BatteryDesign (8 Variations) Students are attempting to construct a battery in the laboratory that will light up a light bulb. Compare the following lists prepared by students and determine which student will not be able to successfully build a "battery" that will light up the bulb.
Organic Chemistry: Synthesis and Study of Reactive Intermediates Found in Interstellar SpaceCaroline R. Pharr and Robert J. McMahon This Today's Science for Tomorrow's Scientists (TSTS) tutorial introduces current scientific research to synthesize and study the structure, photochemistry, and spectroscopy of reactive organic molecules, many of which are thought to play a role in the chemistry of interstellar space. Pharr, Caroline R.; McMahon, Robert J. J. Chem. Educ.2008, 85, 1454.
Photochemistry |
Astrochemistry |
UV-Vis Spectroscopy
Fog Machines, Vapors, and Phase DiagramsEd Vitz This series of demonstrations elucidate the operation of commercial fog machines using common laboratory materials and can be adapted for elementary through tertiary levels. The formation of fogs is discussed in terms of the phase diagram for water and other chemical principles. Vitz, Ed. J. Chem. Educ.2008, 85, 1385.
Liquids |
Phases / Phase Transitions / Diagrams |
Physical Properties |
Water / Water Chemistry
Stilling Waves with Ordered Molecular MonolayersEd Vitz The amazing ability of a film of oil one molecule thick to dissipate the relatively large energy of water waves can be readily demonstrated, but an explanation of the effect has been elusive until recently. Vitz, Ed. J. Chem. Educ.2008, 85, 1064.
Sound & Light A collection of activities that explore basic concepts dealing with sound and light. They are written for the 4-6th grade level.
Float or Sink It is wrong to think that light things float, while heavy things sink. For example, a heavy log will float down a river, but a light grain of sand will sink. How heavy an object is does have something to do with whether it will float or sink. But there is more to the story. In this activity students investigate what causes an object to float or sink.
Physical Properties |
Solids
Batteries ? Energy to Go Students create a simple circuit by connecting a bulb to a battery. Connecting the bulb and wires to the ends of the battery gives the electrons a path to travel from one metal to the other. The battery produces electricity used to light the bulb. ,
Photoelectric EffectWilliam F. Coleman This is a series of simulations of aspects of the photoelectric effect. There is an animation of the experiment with four choices of incident radiation - low and high intensity "red", to represent low energy light and low and high intensity "blue" to represent higher energy light. Electron production is animated and there is an ammeter to simulate current flow. Additional simulations show the effect of light frequency and intensity. There is a link to a spreadsheet that allows students to choose a sample from among five metals. The spreadsheet includes several questions to be answered after working through the materials.
