While using a dimmer switch to investigate a new type of incandescent light bulb

Question

While using a dimmer switch to investigate a new type of incandescent light bulb, you notice that the light changes both its spectral characteristics and its brightness as the voltage is increased. Part A If the wavelength of maximum intensity decreases from 1750nm to 1650nm as the bulb's voltage is increased, by how many degrees Celsius does the filament temperature increase? Part B By what factor does the total radiation from the filament increase due to this temperature change?

Explanation / Answer

A) T1=2.9*10^6/1750nm =answer in Kelvin-->convert to Celsius (1) T2=2.9*10^6/1650nm =answer in Kelvin-->convert to Celsius (2) Celsius 2- Celsius 1= Answer A

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