Physics 7408/3BA June 2019

The AQA Paper 3 Physics exam (June 2019), Section B (Astrophysics), includes a range of questions on telescopes, stars, and galaxies. Topics covered include chromatic aberration in refracting telescopes, the structure of Cassegrain telescopes, and a comparison between optical reflecting and radio telescopes. The exam also explores the properties of stars in the Canis Minor constellation, including absolute magnitude, spectral classes, and the methods of detecting exoplanets like radial velocity. It further includes questions on the Hertzsprung-Russell diagram, the evolution of stars, supernovae, and the placement of black holes, along with a discussion of Hubble’s Law and challenges in measuring the distance to quasars.