A thousand years after the "Big Bang" the background temperature of the universe was at $\backsim$10⁵ K.The peak wavelength of the blackbody radiation at that temperature is A)29 nm B)290 nm C)56 nm D)560 nm E)730 nm

Question

Quizplus · Accepted Answer

Using Wien's Law, the peak wavelength (λ_max) is inversely proportional to the temperature (T). For T = 10^5 K, λ_max = b/T, where b ≈ 2.897 x 10^-3 m*K. Calculating gives λ_max ≈ 29 nm.

A Thousand Years After the "Big Bang" the Background Temperature ∽\backsim∽

A Thousand Years After the "Big Bang" the Background Temperature $\backsim$