The Wilkinson Microwave Anisotropy Probe (WMAP) was a spacecraft operating from 2001 to 2010 which measured temperature differences across the sky in the CMB radiation.
State what the 'B' in CMB radiation stands for.
53 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift. Each one has a worked solution and a mark scheme showing where the marks go.