The Planck space observatory, launched in 2009, mapped the CMB radiation with high precision.
State what the 'C' in CMB radiation stands for.
[1]
Markscheme
7.2 The Universe and red-shift Questions
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.