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Physics

GCSE · Edexcel

QuestionsFlashcards

Expressing Quantities & SI Units
- Units & Prefixes
  6
- Conversions & Standard Form
  6

The Cosmic Microwave Background Flashcards

All 6 cards in this deck

What does CMB stand for?: Cosmic Microwave Background (radiation).
What is cosmic microwave background radiation?: Low-energy microwave radiation that comes from all directions in space, left over from the Big Bang.
How does CMB radiation provide evidence for the Big Bang theory?: The Big Bang was an initial explosion that released radiation, which has spread out and is still detected today.
Why did the discovery of CMB radiation make the Big Bang the accepted model?: The Big Bang theory can explain the CMB but the Steady State theory cannot, so Big Bang had more supporting evidence.
True or false? CMB radiation is only detected when telescopes point towards the centre of our galaxy.: False. CMB radiation is detected coming from all directions in space.
True or false? CMB radiation was predicted before it was discovered.: True. The Big Bang theory predicted leftover radiation, which was later detected as microwaves.