The leftover radiant energy from the “Big Bang” is measured to be about 2.9 K. What is t...

The leftover radiant energy from the “Big Bang” is measured to be about 2.9 K. What is the wavelength of maximum emission of this energy? What kind of equipment would you need to detect this energy? (Hint: It would be a specialized version of a common electronic device [see Figure 2-7].)

(Reference Figure 2-7)