GCSE Physics - What is Red Shift? #87

This video answers:
- What is red shift?
- How did we discover red shift?
- Why is space stretching
- Why is the universe expanding
- How to we know the universe is expanding

Exam board specific info:
AQA - Separate/triple science only
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Separate/triple science only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science only

Maths Playlist:

GCSE Chemistry playlist:

GCSE Biology Playlist:

GCSE Physics Playlist:

[thomsonjoy]

'The universe ISN'T LIKELY to burst' - Very reassuring

I've got my last gcse exams tomorrow, thank you so much for all your videos they have been a life saver

[dantesparda]

And so the revision ends where it all began. How poetic.

[Charlie_phrog]

Amadeus ur carrying me throught my GCSEs fr ♥

[Learner-wzou]

My name is Daniel, I'm a student studying for SPM, a must score exam in Malaysia and your GCSE videos have become my main source of revisions. I've just gone through every physics video you've posted and you're helping me more than I could ever ask for. Thank you so much, Cognito! 👏😃

[johngalvan]

yess u guys r so underrated, ur vids has been helping me out when my teacher gave up on me :')

[zahriasarwor]

I get confused extremely easily when it come to physics. Therefore this really helped me understand redshift so much better now, thank you so much!

[drghostgames]

Studying for my last olevels physics exam
Ever so grateful to this channel, we shall meet again in Alevels
Insha Allah

[Cognitoedu]

- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.

Amadeus & Tom

[georgehurstt]

My last GCSE today, thank you for all your help!

[abigaillee]

ive just finished watching all of you videos for science and i have my last gcse tmmr! tysm u literally saved my grades

[kriston-rosshogan]

I heard someone explain it like this; when you hear an ambulance passing you by, you hear the sound getting lower and lower, that's essentially what's going on but visually, red is at the end of the colour spectrum so you will see it when something is moving away from you.
it really made me understand it

[aaronrussell]

thanks for responding to my request-very quick. You are now my go to for physics videos

[MidnightStorm]

You gotta advertise more man. This channel is f*cking underrated.

[orchid]

I just love the way everything you explain so easily, it helps a thank you ❤

[elfyiryan]

underated channel!! simply the best !!

[nevasimsek]

I would like to start by saying I really appreciate these videos, but its a shame you didn't mention the doppler effect. we spent a quite a bit of time on how the sound waves are similar to light waves in the aspect of how as from the observes point of view the source of light/sound gets farther away the wave stretches. I am pretty sure its going to be on our end of topic test as well so it would be really appreciated if you could add that on here.

[shangitashahid]

thank you so much for helping out with these things that were impossible to understand☺

[pixpyplish]

i was having a hard time understanding about the spectral lines, now its clear . thanks!

[onlyforzestudiess]

@Cognito Thanks so much, not only for the super useful video but also for the revision site, for making it free, it has helped me a lot 💕 thanks again!!