You will know that most light seen in the universe is thermal and can be represented by a Planck spectrum. You will be able to perform calculations and understand conceptually the relationship between...You will know that most light seen in the universe is thermal and can be represented by a Planck spectrum. You will be able to perform calculations and understand conceptually the relationship between temperature and peak wavelength. You will be able to perform calculations and understand conceptually the relationship between flux and temperature.