Physics 9-1 4PH1: Astrophysics Topical Past Paper Questions
Edexcel IGCSE (9-1) Physics 9-1 (4PH1) past-paper questions on Astrophysics, free. This topic is frequently examined across 13 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Galaxies A, B and C are different distances from the Earth. Galaxy A is moving away from the Earth with a velocity of $ 1.7 \times 10^{4} $ km/s. (a) The reference wavelength for light arriving at the Earth from galaxy A is 506 nm. Calculate the observed wavelength for the light…
(a) Which of these is the main source of energy in stars? A alpha decay B beta decay C nuclear fission D nuclear fusion (b) The table lists the stages of development of a star that has a very much larger mass than the Sun. Give the stages in the correct order, using numbers 1 to…
This question is about stars. (a) The table gives some information about four stars. (i) Star C is much more powerful than star A. Stars A and C appear to have the same brightness when viewed from Earth. Suggest how this is possible. (ii) Using information from the table, explain…
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