Why nothing with mass can reach the speed of light — the Lorentz factor γ diverges as v approaches c

What gravitational lensing confirms — mass curves spacetime and bends the path of light

Gravitational lensing confirms that mass warps spacetime, bending light's trajectory

Why special relativity doesn't need the luminiferous aether — the Michelson-Morley null result becomes expected

Special relativity's framework negates aether's need, as light's speed is invariant, aligning with Michelson-Morley's findings

Why Einstein's photoelectric explanation used Planck's E=hf to predict that higher frequency light ejects faster electrons

Planck's equation E=hf quantifies light energy, explaining higher frequency photons eject electrons more rapidly

What the cosmological constant problem is — quantum field theory predicts vacuum energy 10^120 times too large

Quantum field theory overestimates vacuum energy by 10^120 times, causing the cosmological constant problem

What the Olbers' paradox asks — why is the night sky dark if there are infinite stars (answer: finite age of universe)

Olbers' paradox: Night sky dark due to universe's finite age limiting starlight

Why neutrino oscillations proved neutrinos have mass — contradicting the original Standard Model

Neutrino oscillations imply mass differences, violating Standard Model's massless neutrino assumption