1. Your normal body temperature is 98.6 degrees F. What wavelength of light do you emit? Is this visible? (Hint: change Fahrenheit to Kelvin before using the formula).

2. A light source emits infrared radiation at a wavelength of 1150 nm. What is the Temperature of the light source?

3. Calculate the wavelength of H(H-eta), the spectral line for an electron transition between the n=2 and n=7 orbits for a hydrogen atom. What part of the spectrum is this in (infrared, Ultraviolet, visible)