Arc light spectrum recombined with concave mirror on lucite rod.

6F10.30 • E+5+20

diagram for demo

Arc light spectrum recombined with concave mirror on lucite rod. An optical bench is arranged with an adjustable slit and prism so that the spectrum from the prism fills a large concave mirror. A translucent lucite rod is placed at the focus of the mirror in full view of the class. The optical system is arranged so that the spectrum is focused on the mirror. Light shields are used to block out portions of the spectrum that fall on the concave mirror. Thus, only desired colors are directed to the lucite rod. If the entire spectrum is brought to focus on the rod, the result is a spot of white light.

Related Demos

6F10.25 Newton's color disk: When rotated,appears white. 6F10.16 Three-color projector for additive color mixing with arc lamp. 6F10.20 Cyan, magenta, and yellow filters mix subtractively on OHP. 6F10.61 Color by reflected and transmitted light, using gold leaf.
E+5+0 Standard color blindness tests and box of colored yarns. E+5+5 Red, green, blue light on three-sided rotatable pyramid. E+5+10 Newton's color disk: When rotated,appears white. E+5+15 Three-color projector for additive color mixing with arc lamp. E+5+25 Cyan, magenta, and yellow filters mix subtractively on OHP. E+5+30 Arc light spectrum with various filters. E+5+35 Rotating disk with black and white lines makes color illusion. E+5+40 Purkinje effect: At low intensity, blue is more visible than red. E+5+45 Two slides plus red and green light gives full color illusion. E+5+50 Applet: Color Vision E+5+55 Applet: Optical Illusions E+5+60 Applet: Additive Color