Physics 7408/3BA June 2020

The AQA A-level Physics Paper 3B (November 2020), Option A (Astrophysics), explores advanced astronomical concepts including telescope optics, star properties, and cosmic phenomena. Topics include ray diagrams for Cassegrain telescopes, resolving power calculations, and comparisons of telescope capabilities. The paper emphasizes the analysis of star temperatures, magnitudes, and spectral data. Key areas also cover Type 1a supernovae as standard candles, Hubble’s law, and black hole event horizons. Students analyze power output ratios and consider the life cycle of supergiants in relation to potential cosmic threats. Keywords: AQA Physics, astrophysics, Cassegrain telescope, star magnitude, black holes, Type 1a supernova, Hubble constant.