Physics 7408/3BA June 2021

The AQA A-level Physics Paper 3B (November 2021), Option A (Astrophysics), focuses on stellar evolution, observational methods, and galactic phenomena. Topics include Hertzsprung-Russell diagrams, Type 1a supernova light curves, and transit method limitations for exoplanet detection. Key calculations involve stellar luminosity, orbital radii, and redshift-derived distances. The paper explores spectral intensity analysis, quasar activity cessation, and telescope performance. It addresses the Rayleigh criterion, UV telescope advantages, and radio astronomy using parabolic and spherical dish telescopes. Keywords: AQA Physics, astrophysics, stellar evolution, Type 1a supernova, transit method, redshift, Hertzsprung-Russell, radio telescopes.