1. The problem statement, all variables and given/known data Two scientists detected the cosmic microwave background radiation at a frequency of 160 GHz. What is the temperature of the universe? 2. Relevant equations peak wavelength x temperature = 2.898 x 10^-3 c = f x wavelength 3. The attempt at a solution I calculated the wavelength of the microwave radiation to be 1.875x10^-3m. So the temperature is 1.5456K. But the answer is 3K... How come??