I2-04 WIEN'S LAW OF THERMAL RADIATION

ID Code: I2-04
Purpose: Shows that higher temperature blackbodies radiate with shorter wavelengths
Description: A variac is connected to two identical light bulbs in parallel, which are viewed behind red and blue filters respectively. As the voltage is increased by the variac, the lights glow more brightly, and more light is seen through the blue filter relative to that of the red filter. Very little or no blue is seen at low voltages, whereas red is seen to be emitted even at very low voltages.
Availability: Available