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Horrible microwaves question Part 1 (definition)
Horrible microwaves question Part 2 (aerial length)
Horrible microwaves question Part 3 (changing signal strength)
Horrible microwaves question Part 4 (changing signal strength two more ways)
Horrible microwaves question Part 5 (changing signal strength two MORE ways!)
Accelerating electrons
The puzzle of the photoelectric effect
Einstein's solution (photons)
Max kinetic energy
Practical to find h
Particles behaving like waves
Electron diffraction
Atomic energy levels
Emission and absorption spectra
Red shift and the Doppler effect
Parallax angles and the parsec
Hubble's law and the expanding universe
The Big Bang Theory
Blackbody radiation and Wien's displacement law
Inverse square law
Luminosity and Stefan's Law
Evolution of the universe
Dark matter and dark energy
Life cycle of stars
The Chandrasekhar limit
Diffraction of particles question
Photoelectric effect question
Binary star system question
Determining the distance to a nearby star question
Another binary star system question
Leptons
Quarks
Isotopes and nuclear decay equations
Fundamental forces and conservation laws
Electromagnetic interactions (annihilation, pair production and exchange particles)