Light Applets

You need to have the Java plug-in from http://java.sun.com/products/plugin/.

Run the applet. Then drag the red dot so Dino's time is shortest.	Now make Dino save the drowning person in the shortest time.

Run the applet. Then drag the red dot so Dino's time is shortest.	Now make Dino save the drowning person in the shortest time.

Run the applet. Then drag the red dot so Dino's time is shortest.	Now make Dino save the drowning person in the shortest time.

Run the applet. Then drag rays (white lines).	Change media with sliders and drag rays.

Click on the flashlight and then drag the mouse under the water to some distance. Can you find the key?	Click on the flashlight and then drag the mouse under the water to some distance. Can you stay on the fish for 30 seconds?

Click on the flashlight and then drag the mouse. Can you find the angle where the transmitted beam disappears?	Use the sliders to change media. The lifeguard adjusts to minimize time.

Move the slides to change the amplitude and frequency of the transverse wave.	Click anywhere and watch the circular waves spread out.

Drag the slanted line to change the orientation of one of the overlapping polarizers.	Start the timer in each case (1-5) by clicking on Send and quickly stop the timer when you see the light flash return by clicking on the same button (that will now be reading Receive). Be quick to minimize reaction time so you can measure the speed of light.

Adjust the slider to find the maximum response - the resonance.	Use the mouse to shake the block. If you are very natural, you will generate a sine wave (smooth hills and valleys).

Use the controls to measure the wave speed. Ruler markings represent meters. The product of the wavelength and frequency should be equal to the wave speed.	Drag the circle to change the angle; use the slider to increase dispersion.

Simplified model for diffraction.	The classic Two-Slit Interference Experiment. What happens when you change the slit separtion? What about the wavelength?

Simulation of visible spectrum. Drag the sliders to change amplitude and wavelength.	Measure the wavelengths of the four visible Balmer lines of the hydrogen spectrun. Use the slider and the arrows at each end.

Convert HSB to RGB. Click on the "HSB -> RGB" button to open the applet.