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IP A typical light bulb contains a tungsten filament that
Chapter 30, Problem 9P(choose chapter or problem)
Problem 9P
IP A typical light bulb contains a tungsten filament that reaches a temperature of about 2850 K, roughly half the surface temperature of the Sun. (a) Treating the filament as a blackbody, determine the frequency for which its radiation is a maximum. (b) Do you expect the light bulb to radiate more energy in the visible or in the infrared part of the spectrum? Explain.
Questions & Answers
QUESTION:
Problem 9P
IP A typical light bulb contains a tungsten filament that reaches a temperature of about 2850 K, roughly half the surface temperature of the Sun. (a) Treating the filament as a blackbody, determine the frequency for which its radiation is a maximum. (b) Do you expect the light bulb to radiate more energy in the visible or in the infrared part of the spectrum? Explain.
ANSWER:
Step 1 of 2:-
a)
Here, we have to find the frequency for which the radiation will be maximum.
Given that,
.
We know from Wien’s displacement law that,
.
So, the frequency at which the radiation will be maximum is .