Demos: 7C-02 LED Array
This is a 12 inch tall tower with eleven different color LEDs whose range covers the visible spectrum and includes white light. Wavelengths and colors of all lights are marked on the array.
Directions for doing the demo: Place the array behind the large diffraction grating and turn on the white light diode. The grating will diffract the light into the different components of the visible spectrum. Proceed to turn the switch which will singularly activate the remaining color diodes and students can observe how wavelength affects the different colors. At the last turn of the switch, all colors are illuminated and students can see the diffraction patterns for all colors and how it is related to white light. The array has diodes ranging from deep red to violet as well as a white light diode. Wavelengths of each color are marked on the array.
Applications: Automotive and commercial lighting.