Examples of web experiments
Web experiments are an exciting marriage of Internet technology with practical science applications, which support science education.
Here you can find a selection of web experiments (pdf), together with their pedagogical value. If you are running a web experiment, please get in touch with Karl Sarnow and tell him more.
Telescopes are operated remotely, and digital images (CCD format) are taken of the astronomical objects. The user then receives the images, and they are also stored in the image database.
Powerful telescopes as well as good quality astronomical CCD cameras are expensive and beyond the financial scope of a school. Remote controls mean that schools can observe the night sky via a distant telescope, even during the daytime.
For physics, this site proposes interference experiments on grids and slits. The documentation is in German.
Numerical analysis is easily carried out on the images shown by the webcam. Free software for analysis is also available. Every student can get their own data set.
An electron beam is fired at graphite foil. The diffraction pattern is observed on a screen.
The result is a digital image, which is easy to analyze using free software. Every student can get their own data set.
You can take part to this webexperiment on the Xplora portal. You just need to register to the portal and then login to the Desktop and choose "Web experiments - Electronic Diffraction".
You will be able to:
- Reserve a timeslot for your web experiment
- Conduct your Web experiment
- Input a Web Experiment result.
Additional detailed documentation for teachers and pupils is available in English and German.
This experiment involves remote operation of expensive electronic microscopes. The documentation is in English.
Electron microscopes and raster tunnel microscopes are normally not within the reach of schools, and can give students an insight into advanced microscopy.
A laser beam is used to move microscopic bodies in the view field of an optical microscope. The documentation is in German and English.
The experiment gives involves handling complicated and expensive apparatus, used in micromanipulation, but in a simplified way.
ROBOT IN A MAZE
The user can control the moves of a robot in a maze. The documentation is in German and English.
Students can learn to control a robot.
A suite of three experiments from wind energy via electrolysis of water to hydrogen cells. The documentation is in German and English.
Pupils can learn, play and carry out the experiments.
DAMPED HARMONIC MECHANIC OSCILLATION
A damped harmonic oscillation is triggered. The data is sent to the user. A video file of the experiment can be requested. The documentation is in English.
Every student can get their own data set. The data can be fed into a spreadsheet or data analysis program for further investigation.
FREQUENCY RESPONSE OF HARMONIC OSCILLATOR TO EXTERNAL EXCITATION
Forced harmonic oscillation is recorded. Pupils may repeat this experiment at several frequencies to construct a resonance curve. The documentation is in English.
Every student can take his own set of frequency responses to construct his/her own version of the resonance curve of this oscillating object. All pupils finally should get a similar shaped curve.
An industrial robot can be controlled by the pupil. The documentation is in English.
"Hands on" practice with industrial robots.