The relationship between wavelength and temperature in relation to blackbody radiation. The wavelength decreases as the temperature increases. The common formula to determine this relationship is Plank's Formula. [Eisberg, R & Resnick, R. "Thermal Radiation." in Quantum Physics of Atoms, Molecules, Solids, Nuclei, & Particles. 2nd ed. New York: Wiley, 1985.]
