In this activity, students apply the Stefan-Boltzmann equation and the principle of energy balance in steady state to find the steady state temperature of a black object in near-Earth orbit.
This activity follows Using the Stefan-Boltzmann law
You're in charge of designing a black cylindrical space capsule for a manned trip to the Moon. You need a volume you will be comfortable in, and you want the temperature to be cozy. What dimensions should your capsule be (assuming the entire surface is a uniform temperature), and how should it be oriented?
group Small Group Activity
10 min.Contemporary Challenges 2022 (3 years)
assignment HomeworkStefan-Boltzmann blackbody radiation Thermal and Statistical Physics 2020 A black (nonreflective) sheet of metal at high temperature \(T_h\) is parallel to a cold black sheet of metal at temperature \(T_c\). Each sheet has an area \(A\) which is much greater than the distance between them. The sheets are in vacuum, so energy can only be transferred by radiation.
Solve for the net power transferred between the two sheets.
Optional: Find the power through an \(N\)-layer sandwich.
10 min.Static Fields 2022 (4 years)
120 min.Thermal and Statistical Physics 2020 Thermal and Statistical Physics cover blackbody radiation and the Planck distribution. They include a number of small group activities.
10 min.Contemporary Challenges 2022 (3 years) This brief lecture covers the basics of heat engines.