A Level Physics Revision: All of Cosmology | Parallax, parsecs, Doppler, CMBR, Hubble's Law

My full online lessons on Cosmology and Astrophysics:

More on Dark Matter and Dark Energy:

Chapters:
00:00 Intro
00:10 Units
01:05 Parallax and parsecs
05:37 The Cosmological Principle
06:03 The Doppler Shift
08:36 Hubble's Law
10:48 Converting Hubble's constant
12:26 Age of the universe
14:11 The Big Bang Theory
15:34 Cosmic Microwave Background Radiation
16:17 Dark Energy and Dark Matter

[zhelyo_physics]

Hi guys! I have also filmed some past paper questions practice. Hopefully it is helpful! : )

[mdarmanhossain]

I really feel like God sent you as an angel to help me with my exam 😭. Thank you so much!

[kxaie]

Fantastic video, helped alot, only thing is at the end with the section about dark matter, that section replayed.

[Vigilant]

I'm super glad that you exist, love your explanation dear sir!

[DRMAOMMAIZEINNG]

awesome video, really helped for my upcoming exams, which is starting with paper 1. One thing to point out is that you seem to accidently repeat the dark matter section twice, not sure if this was intentional or not.

[gjeraldh]

Thank you, it is helpful to revise after my lessons.

[enurih]

Thank you for this video! This was incredibly helpful!

[nonviablegerm]

Absolute legend, thanks so much for the video!

[bigboyali]

quick question! If hubble's constant a... constant, and if the age of the universe is 1 divided by hubble's constant does that mean the age of the universe is constant? frozen in time? or is hubble's constant isnt really a constant and just changes with time? in that case what would a hubble's constant against time graph look like?

[nadiaaaj]

awesome. thank you so much. hope this helps me on on test next week

[gautammorkhandikar]

do we need to know about the doppler effect or just the equation for doppler shift in OCR? Also are we expected to know red shift and blue shift?

[Zecos]

wow studying the big bang has made my belief in religion stronger!!!! it sounds soo stupid and even science cant explain the universe!! tysm physics ilysm :)

[xodusgraphicdesigns]

Thanks for the video really good, i like how you don’t put in useless info. Can you do a specific big bang video because the ocr exam i have done requires more info on the Big Bang. E.g the universe is hot and dense…

[emmanuelige]

Hi sir, do you agree with this statement or am I incorrect. If the lab wavelength is shorter than the measured wavelength then the object is moving away (Redshift), and if the lab wavelength is longer than the measured wavelength, then the object is moving closer (Blueshift).

[kausarlolz]

hi sir, do we need to know the time for the big bang processes? for ocr a

[SorabeeZ]

do you need to know ab olbers paradox, open, closed, flat universe and their graphs and critial density for OCR A? ive seen it come up in topic questions but its not something we learnt in school.

[justinlash]

i]s ]this sequence of big bang ]] enough for full marks

[yana]

hi hi, a quick question that i kinda need clarifying, if we got asked a question on the big bang, would we need to know the time stamps? for example it was 380000 years after the big bang when the universe started to cool down, would the time have to be stated?

[jameshosking]

Do I need to know the exact value of an astronomical unit?

[udayreddy]

hi sir i came across this formula where light years = 1AU/ 1 light year. Is this right ? And if so when is it really used?