Universe / Cosmic Inflation



COSMIC EXPANSION

Inflation theory was first proposed by Alan Guth in 1979 at Cornell University US.

In Physics "universe expansion" is the exponential growth of the space in the universe. The inflationary epoch lasted from about 10^-36 seconds from the big bang event to sometimes between 10^-33 to 10^-32 seconds after the big bang singularity.

Cosmic Inflation explains various critical conepts 

  1.  Why universe is Homegeneous ?
  2. Why universe is flat ?
  3. Why Cosmic Mirowave Background Radiations (CMBR) disturbed ?

Eternal Inflation:

Eternal inflation is a hypotheical inflationary universe model, which is itself an outgrowth or extension of the big bang theory.
According to the eternal inflation. The inflation phase of the universe lasts forever throughout the universe.

Three Puzzles:

Cosmic inflation give answer to the following puzzles or mysteries of the universe.
  1. The universe is so uniform on large scale. Normally different objects are same because they have been in contact some time in the past.  But the universe is same throughout although different part of the universe have not communicated.
  2. The geometry of the universe is so flat.
  3. lumps on the large scales of universe, which have turned into galaxies and stars from where did these fluctuation came from.

Universe After Inflation:

The universe had to roll down from the peak of the Mexican Hat Diagram one way or another causing the forces of nature to split from each other and then the exponentiation growth of the universe ended
After the cosmic inflation the universe became 10^50 larger then before inflation.

Reference : https://en.wikipedia.org/wiki/Inflation_(cosmology)


 

Comments

Post a Comment

Popular posts from this blog

Astronomy & Astrophysics General Knowledge

Image
  Closest to Earth: Andromeda (M31) ---- 2.5 million Light Years (distance)---------- Closest Galaxy Proxima Century ----- 4.423 Light year (distance)--------------- Closest Star HR 6819 ------------ 1.09 Light Year (distance)--------------- Closest Black hole Markarian 231 ------- 581 million Light Years (distance)---------- Closest QUASAR Neowise ----------- 0.69 Astronomical Unit (distance)----------- Closest Comet Geminga ----------- 800 Light Years (distance)---------------- Closest PULSAR Distance Measuring Units: Astronomical Unit: An Astronomical Unit (AU) is the distance between earth and sun which is equal to 93 million miles or 153 million kilometers. Astronomical Unit is usually used to measure the distance within the solar system Parsec: The parsec is the unit of length used to measure the large distances to astronomical objects which are outside of the solar system.  1 Parsec = 31 trillion kilometre                         1 Parsec = 210,000 astronomical units AU 1 Parsec
Read more

AC-DC Power Supply 1 ( Block Diagram)

Image
  THEORETICAL BLOCK DIAGRAM So the basic purpose of a power supply is to convert and AC signal to DC Signal. The block diagram of the power supply would be something like given below The small electronic circuits cannot handle high voltage current. So a transformer is used to reduce the AC input and will give the required AC voltage value at output Now to convert an AC signal to DC signal A rectifier is used. The output from the rectifier is not a pure DC output. In fact, it contains a lot of ripples and it is highly not smooth. To make the DC output smooth and remove the AC content of the rectifier a filter circuit is used. This filter is either LC (inductor-capacitor) filter, RC (resistive – capacitive) filter. The choice of the filter depends on the designer of the circuit and to the type of power supply. The output now becomes a full DC with constant signal but still it is unregulated voltage. Meaning that a designer is receiving a higher than required voltage. So,
Read more