COSMIC MICROWAVE BACKGROUND RADIATION (CMBR)

Why in news?
Scientists from the Raman Research Institute in
Bengaluru have conducted an experiment for
detection of Cosmic Microwave back ground
radiation in Timbaktu in Andhra Pradesh.
More about news
• Timbaktu was chosen as it is described as
Radio Quiet — an area where there is virtually
no interference from signals produced by
modern technology like mobile, TV etc. which
makes it most suitable place to detect even
faint electromagnetic signals from the sky.


Cosmic Microwave Background Radiation
(CMBR)
• It is an all-pervasive, but weak,
electromagnetic radiation from the early
universe, about 3,80,000 years after the Big
Bang when matter was still to be formed.
Most cosmologists consider this radiation to
be the best evidence for the hot big bang
model of the universe.
• This radiation does not come from any of the
objects that we see in the universe, like stars
or galaxies but from a time when matter and
radiation were in thermodynamic
equilibrium.
• The spectrum produced by CMBR is very
smooth. It does, however, contain small
wiggles, or deformities, in its shape.
• Each of these wiggles has valuable encoded
information about specific events that took
place as the first stars were born.

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