OCR A level Physics: Stars

OCR A level Physics: Chapter 19 Stars is apart of the Module 5: Newtonian world and Astrophysics.

All presentations come with worked examples, solutions and homeworks.

19.1 Objects in the Universe
19.2 Life Cycles of Stars
19.3 Hertzsprung-Russell Diagram
19.4 Energy Levels in Atoms
19.5 Spectra
19.6 Analysing Starlight
19.7 Stellar Luminosity

• The size of astronomical objects: Universe, Galaxies, Solar systems, Stars, Planets, Planetary satellites, Comets, Artificial planetary satellites
• Comparing planets and comets
• The birth of stars
• Stars in equilibrium during the main sequence
• Calculating mass in kg from solar mass
• Life cycle of stars with a mass between 0.5 and 10 solar masses
• Life cycle of stars with a mass above 10 solar masses
• Pauli exclusion principle and electron degeneracy pressure
• Red giants and white dwarfs
• The Chandrasekhar limit
• Red supergiants to black holes and neutron stars
• Stellar nucleosynthesis
• Definition of luminosity
• Usual axis choice of a HR diagram.
• Identifying the positions of the main sequence, white dwarfs, red giants, and red supergiants.
• Description of how stellar evolution is shown in a Hertzsprung-Russell diagram
• Atoms have different electron arrangements
• Ground state energy
• Bound electron states being negative
• Converting between joules and electronvolts
• Calculating the change of energy between energy states
• Calculating a photon’s frequency and wavelength
• The electromagnetic spectrum and wavelengths
• Definition of spectroscopy
• Electrons and energy levels
• Continuous spectra
• Emission spectra from gases
• Absorption spectra from gases
• Electromagnetic interference
• Double slit experiment
• Path and phase difference
• Diffraction grating
• The grating equation
• Lines per millimeter to grating spacing
• Maximum order, n
• Maximum number of maxima
• The electromagnetic spectrum, frequency/wavelength, and temperature
• Black body radiation
• Wein’s displacements law
• Stefan’s law (Stefan-Boltzmann law)