Which row correctly identifies the primary nuclear fusion process occurring in the core of a main-sequence star like our Sun, and the region of the electromagnetic spectrum where its thermal emission spectrum peaks?
| Core Fusion Process | Peak Emission Region | |
|---|---|---|
| A | Hydrogen fusion into helium | Visible light |
| B | Hydrogen fusion into helium | X-ray radiation |
| C | Helium fusion into carbon | Visible light |
| D | Helium fusion into carbon | Ultraviolet radiation |
Row A
Row B
Row C
Row D
104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.