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7.2 The Universe and red-shift

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Question 18
H

In 1965, two radio astronomers detected microwave radiation coming from all directions in space.

At first, they thought the signal was caused by a fault in their equipment.

a.

Suggest why the astronomers thought that the signal was caused by a fault in their equipment.

[1]
b.

Explain why the Big Bang theory predicts radiation coming from all directions in space.

[2]
c.

This radiation was emitted with a much shorter wavelength than microwaves.

Explain why it is now detected as microwaves.

[2]
d.

Explain why the Steady State theory could not account for this radiation.

[2]
Markscheme

7.2 The Universe and red-shift Questions

  1. GCSE
  2. /Physics
  3. /7.2 The Universe and red-shift

94 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift, covering 7.2.1 Big Bang and Steady State theories, 7.2.2 Evidence for the Big Bang, 7.2.3 The Doppler effect and red-shift, 7.2.4 Red-shift as evidence for an expanding Universe, and 7.2.5 The CMB and the accepted model. Each one has a worked solution and a mark scheme showing where the marks go.

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