OCR A level Physics: Cosmology (Big Bang)

OCR A level Physics: Chapter 20 Cosmology (Big Bang) is apart of the Module 5: Newtonian world and Astrophysics.

All presentations come with worked examples, solutions and homeworks.

20.1 Astronomical Distances
20.2 The Doppler Effect
20.3 Hubble’s Law
20.4 The Big-bang Theory
20.5 Evolution of the Universe

• Astronomical distances: light-years, parsec, astronomical unit
• Astronomical angles - degree, arcminute, arcsecond
• Parallax Angle
• The definition of the Doppler effect
• Changes in pitch of sound waves due to relative motion
• Absorption spectra and electron energy levels
• Red-shift and blue-shift absorption spectra
• The Doppler equation
• The condition for velocity for the Doppler equation
• The Cosmological Principle
• Hubble’s Observations
• Hubble’s Law
• Hubble’s constant and the gradient of a graph
• Converting between km s-1 Mpc-1 into s-1
• The expanding Universe model.
• Georges Lemaître’s Theory
• Evidence for the Big Bang Model
• Hubble’s Law (expanding Universe)
• Microwave Background Radiation
• Source of the Microwave Background Radiation
• Hubble’s constant and the age of the Universe
• The evolution of the Universe from the Big-bang to 13.7 billion years later
• The composition of the Universe
• Experimental evidence for dark matter
• Experimental evidence for dark energy