This download is a PowerPoint and lesson plan explaining black body radiation and how this is used to ascertain stellar types from spectra. There is a worked example of calculating flux.
This is lesson 6 / 12 from my Astrophysics / Cosmology course, all available individually or as a bundle at a reduced price.
Stefan’s law and Wien’s displacement law.
General shape of black-body curves, use of Wien’s displacement law to estimate black-body temperature of sources.
Assumption that a star is a black body.
Inverse square law, assumptions in its application.
Use of Stefan’s law to compare the power output, temperature and size of stars
Description of the main stellar classes