Red-Shift & Big Bang — GCSE Physics Revision
Revise Red-Shift & Big Bang for GCSE Physics. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP.
At a glance
- What StudyVector is
- An exam-practice platform with board-aligned questions, explanations, and adaptive next steps.
- This topic
- Red-Shift & Big Bang in GCSE Physics: explanation, examples, and practice links on this page.
- Who it’s for
- Students revising GCSE Physics for UK exams.
- Exam boards
- Practice is aligned to major specifications (AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP).
- Free plan
- Sign up free to use tutor paths and feedback on your answers. Free access is 3 days uncapped, then 30 min practice/day. Pricing
- What makes it different
- Syllabus-shaped practice and progress tracking—not generic AI answers.
Topic has curated content entry with explanation, mistakes, and worked example. [auto-gate:promote; score=70.6]
Recommended next topic
Next step: Solar System & Orbits
Continue in the same course — structured practice and explanations on StudyVector.
Go to Solar System & OrbitsWhat is Red-Shift & Big Bang?
Red-shift is the observed increase in the wavelength of light from distant galaxies. It is evidence that the galaxies are moving away from us. The further away a galaxy is, the greater its red-shift, which means it is moving away faster. This observation supports the Big Bang theory, which states that the universe began from a very hot, dense point and has been expanding ever since.
Board notes: A Higher Tier topic for all major GCSE Physics boards (AQA, Edexcel, OCR). The evidence for the Big Bang theory (red-shift and CMBR) is crucial.
Step-by-step explanationWorked example
Light from a distant galaxy is observed to be red-shifted. What does this tell us about the galaxy? Solution: The red-shift of the light tells us that the galaxy is moving away from us. By measuring the amount of red-shift, we can calculate the speed at which it is receding.
Practise this topic
Jump into adaptive, exam-style questions for Red-Shift & Big Bang. Free to start; sign in to save progress.
Common mistakes
- 1Confusing red-shift with the Doppler effect for sound. The principle is similar, but red-shift applies to light.
- 2Thinking that red-shift means the light is red. It means the light is shifted towards the red end of the spectrum (longer wavelength).
- 3Not understanding the link between red-shift and the Big Bang. The observation that distant galaxies are moving away from us in all directions implies that the universe is expanding from a single point.
Red-Shift & Big Bang exam questions
Exam-style questions for Red-Shift & Big Bang with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP specifications.
Red-Shift & Big Bang exam questionsGet help with Red-Shift & Big Bang
Get a personalised explanation for Red-Shift & Big Bang from the StudyVector tutor. Ask follow-up questions and work through problems with step-by-step support.
Open tutorFree full access to Red-Shift & Big Bang
Sign up in 30 seconds to unlock step-by-step explanations, exam-style practice, instant feedback and on-demand coaching — completely free, no card required.
Try a practice question
Unlock Red-Shift & Big Bang practice questions
Get instant feedback, step-by-step help and exam-style practice — free, no card needed.
Start Free — No Card NeededAlready have an account? Log in
Step-by-step method
Step-by-step explanation
4 steps · Worked method for Red-Shift & Big Bang
Core concept
Red-shift is the observed increase in the wavelength of light from distant galaxies. It is evidence that the galaxies are moving away from us. The further away a galaxy is, the greater its red-shift, …
Frequently asked questions
What is the Big Bang theory?
The Big Bang theory is the leading scientific theory for how the universe began. It proposes that the universe started as an extremely hot, dense point about 13.8 billion years ago and has been expanding and cooling ever since.
What is cosmic microwave background radiation (CMBR)?
CMBR is faint microwave radiation that is present throughout the universe. It is considered to be the leftover heat from the Big Bang and is one of the strongest pieces of evidence for the theory.