The Electromagnetic Spectrum
http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html

Energy Interactions
http://www.geo.mtu.edu/rs/back/energy/

Gustav Robert Krichhoff
https://en.wikipedia.org/wiki/Gustav_Kirchhoff

Max Karl Ernst Ludwig Planck
https://en.wikipedia.org/wiki/Max_Planck

Planck’s Theory of Blackbody Radiation
https://en.wikipedia.org/wiki/Planck’s_law

Niels Henrik David Bohr
https://www.britannica.com/biography/Niels-Bohr

What Is Emissivity?
https://en.wikipedia.org/wiki/Emissivity

Calculators Galore!!! Calculators for just about anything
http://www.martindalecenter.com/Calculators.html

Link to Useful Physics Page
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

Wikepedia.com
https://en.wikipedia.org/wiki/Main_Page