The spectrum of the cosmic microwave background peaks at a wavelength of about 1 mm, and the universe has a temperature of about 3 K. If the spectrum instead peaked at a wavelength of 10 millimetres, what would its temperature be?

Question

Answer

About 3 K, because wavelength is unrelated to the peak temperature.

Answer

Less than 3 K, because lower temperatures correspond to longer wavelengths.

Answer

More than 3 K, because by the time the peak temperature is 10 mm, the Universe will be contracting.

Answer

Less than 3 K, because the Universe slowly cools down over time.

Answer

About 3 K, because temperature won’t change significantly with such a small change in wavelength.

Answer

More than 3 K, because higher temperatures correspond to longer wavelengths.

Crowdly

The spectrum of the cosmic microwave background peaks at a wavelength of about ...

Want instant access to all verified answers on moodle.telt.unsw.edu.au?