microwave background

Show Summary Details

Quick Reference

A cosmic background of radiation in the frequency range 3 × 1011 hertz to 3 × 108 hertz discovered in 1965. Believed to have emanated from the primordial fireball of the big bang with which the universe is thought to have originated (see big-bang theory), the radiation has an energy density in intergalactic space of some 4 × 10−14 J m−3. Detailed study of this radiation has been very important in modern cosmology. See COBE; WMAP.

Subjects: Physics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.