The applet below simulates the operation of a spectrophotometer.
The experiment models the emission of photons by a lamp, the absorption of those photons by a solute in a sample solution, and the detection of the photons by a photomultiplier tube. The photons are represented by little balls (a particulate matter model rather than a wave model). The simulation permits the simultaneous use of two different wavelengths.
The user may specify several operating conditions for the spectrophotometer.
To use the applet
- Select the desired sample.
- Start the simulation by clicking on the green button in the lower right corner of the applet.
- The intensity of photons reaching the detector may be measured using the timer in the lower left corner of the applet.
Operational Notes and Tips
Applet Name: spec.Spec.class
Version: 1.0 (April 1999)
The Spec.class applet was written by David N. Blauch (© Copyright 1999 Davidson College).
Conditions of Use
This applet is still under development; additional refinements will be forthcoming. Known problems and the revision history are listed at the bottom of this page. Please send feedback on performance and information on problems to David N. Blauch.
This applet requires a Java-enabled browser that supports Java 1.1. Netscape Navigator 4.04 or later (with the JDK update for version 4.04) and Internet Explorer 4.1 provide such support.
Please let me know how you like this applet. If you encounter any bugs or errors,
please provide me with the specific details. I would also appreciate any suggestions for improvements.
David N. Blauch; email@example.com
© Davidson College, 1999