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Consider the blackbody radiation emitted at a temperature of 500â—¦C. (i) Explain why a tungsten wire in an...

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Physics

Consider the blackbody radiation emitted at a temperatureof
500â—¦C.
(i) Explain why a tungsten wire in an old-fashioned light-bulbstarts
to glow as it becomes sufficiently hot.

(ii) Calculate the percentage pressure increase of theblackbody
radiation if the temperature is raised to 550â—¦C.

An electron escapes the hot tungsten wire and issubsequently
trapped in a one-dimensional square quantum well. Thepotential
outside the well can be approximated as infinite.


(iii) Sketch the probability distribution of the electron withinthe
square well for the n = 2 quantum state.


(iv) The electron energy for the n = 2 state is 10.0 eV. Calculatethe
width of the well.

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