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Theory of BLACK HOLE
By- Rohan Chakraborty

Theory of Relativity – A Brief History
• The Theory of Relativity, proposed by the Jewish
physicist Albert Einstein (1879-1955) in the early
part of the 20th century, is one of the most
significant scientific advances of our time.
• Although the concept of relativity was not
introduced by Einstein, his major contribution
was the recognition that the speed of light in a
vacuum is constant and an absolute physical
boundary for motion.

• This does not have a major impact on a
person's day-to-day life since we travel at
speeds much slower than light speed.
• . For objects travelling near light speed,
however, the theory of relativity states that
objects will move slower and shorten in length
from the point of view of an observer on
Earth.
• Einstein also derived the famous equation, E =
mc2, which reveals the equivalence of mass
and energy.

Now Einstein
• When Einstein applied his theory to gravitational fields,
he derived the "curved space-time continuum
• -" which depicts the dimensions of space and time as a
two-dimensional surface where massive objects create
valleys and dips in the surface.
• This aspect of relativity explained the phenomena of
light bending around the sun, predicted black holes as
well.
• As the Cosmic Microwave Background Radiation (CMB)
-- a discovery rendering fundamental anomalies in the
classic Steady-State hypothesis

Theory of Relativity – The Basics
• Physicists usually dichotomize the Theory of
Relativity into two parts.
• The first is the Special Theory of Relativity,
which essentially deals with the question of
whether rest and motion are relative or
absolute, and with the consequences of
Einstein’s conjecture that they are relative.

• The second is the General Theory of Relativity,
which primarily applies to particles as they
accelerate, particularly due to gravitation
• And acts as a radical revision of Newton’s
theory, predicting important new results for
fast-moving and/or very massive bodies.
• The General Theory of Relativity correctly
reproduces all validated predictions of
Newton’s theory, but expands on our
understanding of some of the key principles

• . Newtonian physics had previously hypothesized
that gravity operated through empty space
• But the theory lacked explanatory power as far as
how the distance and mass of a given object could
be transmitted through space.
• General relativity irons out this paradox, for it
shows that objects continue to move in a straight
line in space-time, but we observe the motion as
acceleration because of the curved nature of space-
time.

Theory of Relativity – A Testament to
Creation
• Using the observed cosmic expansion
conjunctively with the general theory of
relativity, we can infer from the data that the
further back into time one looks, the universe
ought to diminish in size accordingly.
• However, this cannot be extrapolated
indefinitely.

• to be continued………….

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Theory of black hole

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Theory of black hole