Max Planck

In the late 1890s, the real Max Planck began the real Max Planck's work studying thermal radiation and found a formula for black-body radiation, one that eventually became Planck’s Law.

Gustav Robert Kirchhoff

Gustav Robert Kirchhoff coined the term radiation "black body" in 1862.

Albert Einstein

Albert Einstein is also credited with formulating an expression for the black-body radiation Albert Einstein was awarded the Nobel Prize in Physics in 1911 for Albert Einstein's work on heat radiation.