Object:
Measure how the current through an electric light bulb varies as the applied voltage is changed. This will allow you to establish Stephan's Law for Black Body Radiation.
Introduction:
When an electric current flows through the filament in a light bulb the filament heats up. The filament loses heat in two ways: electromagnetic radiation (mainly visible light and invisible heat radiation) and conduction (through the base of the bulb). The heat conducted away from the filament increases linearly with filament temperature. The air in the bulb is pumped out during manufacture so little heat is lost by convection.
To download the file click on the link below:
http://www.iiserpune.ac.in/~bhasbapat/phy221_files/StephansLaw.pdf
Measure how the current through an electric light bulb varies as the applied voltage is changed. This will allow you to establish Stephan's Law for Black Body Radiation.
Introduction:
When an electric current flows through the filament in a light bulb the filament heats up. The filament loses heat in two ways: electromagnetic radiation (mainly visible light and invisible heat radiation) and conduction (through the base of the bulb). The heat conducted away from the filament increases linearly with filament temperature. The air in the bulb is pumped out during manufacture so little heat is lost by convection.
To download the file click on the link below:
http://www.iiserpune.ac.in/~bhasbapat/phy221_files/StephansLaw.pdf
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