SCIENCE 1.2 Big Bang

Singularity

Point in space/moment in time where universe was extremely hot and dense

Inflation

Theory of exponential expansion of early universe. Epoch lasted 10^-36 secs

Annihilation

Reaction in which a particle/antiparticle collide and dissapear— releasing energy

BB nucleosynthesis

Process of creating new nuclei from pre-existing nucleons (protons nd nuetrons). Production of nuclei other than Hydrogen-1 are formed

Recombination

Epoch where charged electrons and protons first become bound to produce electrically neutral hydrogen atoms

Redshift

Displacement of spectral lines toward red end of spectrum (longer wavelength) in radiation from distant galaxies nd celestial objects. Exhibits a doppler effect

What are the three pieces of evidence for BB theory?

1. Redshift

2. Relative Abundance

3. Cosmic microwave background (CMB)

Relative Abundance

Abundant formation of light elements are still evident in present time (still exists in outer space)

Cosmic Microwave Background

Provides evidence of leftover electromagnetic radiation from an early stage of the universe in bb cosmology

Symbol for proton

Symbol for electron

Symbol for positron

Symbol for neutron

Neutrino

Gamma ray

y

Beta Decay

Neutron is converted to proton by releasing electron and neutrino

Electron Capture

Proton captures electron then converts into neutron with neutrino

Proton Emission

Proton is converted to neutron by emitting a positron and neutrino

Matter/Antimatter Annihilation

Positron and electron annihilate each other to produce gamma ray energy