Question

A scientist is explaining how background cosmic radiation gives evidence of the big bang theory. She says that radiation has been detected everywhere equally as heat in the universe and is increasing. This has been shown to be residual radiation from the big bang. What error did the scientist make?

Answer 1

The errors the scientist made is by indicating that the heat of the cosmic background radiation is increasing. Rather, the CBR is actually ever weakening. As the radiation traverses the universe  from its source of the big bang, even as the universe expands, its energy spreads even further and energy per unit measure decreases.