- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
K8-02. Introduction To Light Behavior
Purpose
To illustrate some fundamental properties of sound and light.
Equipment
BELL IN VACUUM demonstration, laser, smoke source (cigarettes), red food coloring, nipple container on lab jack, clear glass pie pan, beaker.
Setup Time
20 minutes.
Images
Description
The following sequence provides good introductory examples of the behavior of light: (1) Have smoke in the bell jar with the laser beam going in but terminated by a felt pad (on the right side of the jar) and the bell on. (2) Ask "In what does light travel?" Then turn on the pump. The sound dies out and the light path seemingly dies out also. (3) Remove the felt to show that the light didn't stop after all. Therefore light travels in a vacuum. (4) Pull the cap off the water tank; the light follows the water path and one can claim to be collecting the light in the glass pan into which
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See pagesk1. forces on moving charges
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See pagesk2. electromagnetic induction
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See pagesk3. transformers
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See pagesk4. motors & generators
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See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
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See pagesk7. rlc circuits
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See pagesk8. electromagnetic waves
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See pagesk1. forces on moving charges
-
See pagesk2. electromagnetic induction
-
See pagesk3. transformers
-
See pagesk4. motors & generators
-
See pagesk5. electrical properties of matter
-
See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves