Past Programs
Physics with LEDs
Whittier Union High School District
Room MV 200
9401 S. Painter Ave.
Whittier, CA 90605
Friday, February 25, 2005
Registration deadline: February 23, 2005
Presented by the Center for Nanoscale Systems Institute for Physics Teachers (CIPT)
Cornell University, NY
Workshop Schedule:
3:30 – 3:50 p.m. |
Workshop Introduction - Dr. Monica Plisch |
3:50 – 4:35 p.m. |
Hands-on Activity: The Phantastic Photon |
4:35– 5:20 p.m. |
Hands-on Activity:Light Emitting Diodes |
5:20– 5:30 p.m. |
Closing and Evaluations |
Activities:
- "Phantastic Photon " -
Different colors of light are directly related to the energy and wavelength of the photons which compose that light. Students investigate these relationships by shining colored light from super-bright LEDs onto fluorescent paint and glow-in-the-dark tape and observing the emitted light by eye and with a handheld spectrometer. Students order the colors of light from highest to lowest energy and determine the role of light intensity in exciting the energy level transitions involved in fluorescence.
- "Light Emitting Diodes" (LED) -Using super-bight light-emitting diodes students investigate the conversion of electrical energy into light. Measuring and comparing the energy lost by each electron with the frequency of the emitted light for several LED colors allows students to determine Plank's constant, a fundamental number in quantum mechanics. Students also investigate other properties of LEDs and learn why they are increasingly used as indicators and light sources.
For more information contact: BonnieJo Panagos
Telephone: (562)698-8121 ext. 1171
FAX: (562) 693-4136
Register NOW!
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