Special Relativity (AQA Turning Points) - A-level Physics

Please don't forget to leave a like if you found this helpful! .
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00:00 Michelson Morley interferometer
05:30 Einstein's postulates & equation derivation
10:07 Time dilation
12:26 Length contraction
14:33 Relativistic mass & energy -
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[XxJackxX]

Ur getting a like for that joke at the end ;)

[jacobseitler]

At 3.32, the time delay parallel will be longer than the time delay perpendicular

[Ibat_countryI]

Was trying to figure out how to get to the time dilation equation, completely forgot factorization was a thing. Thank you

[zahin.]

3:25 Wouldn’t the ray travelling parallel to the Earth’s velocity be *slower* than the other. Not “faster”.

Light moving *parallel* to the motion of the Earth should take *longer* to travel to the mirror and back than light travelling at *right angles* to the Earth’s motion.

[the_hasnat]

you didnt explain "Bertozzi’s experiment as direct evidence for the variation of kinetic energy with speed."

[challengerchris]

Thanks for the help dude, without ur vids id have no chance of passing

[tomf]

anything on Bertozzi's experiment?

[adityamisra]

The moment after 14:28 scared me alot.

[lauravegad]

Great video, , thank you, It made things much simpler!

[ellecat]

For the michelson and Morley's experiment shouldnt the light travelling parallel to the earth's rotation take longer to come back than the perpendicular one?

[goldybindra]

@science shorts what does "in a laboratory frame of reference" mean in question, is it the proper lenth or the external observers length?

[daniel]

i was wondering why it said video removed on the playlist

[joshplayz]

2 questions:
1. In MM experiment, doesn't an interference pattern only occur if we have point sources of light like slits, here it looks there is a single beam of light?
2. In muon decay, aren't we in the same inertial reference frame as the muon since it is not accelerating relative to us, so why do you say we are in a different reference frame to it?
Thanks

[yoyoyocpo]

Sorry, great vid, but I've got no clue what you did at 12:25.

Also, is it the half life that has stretched or is it simply the time taken to travel between two points has decreased (meaning the number of decays is lower than expected)?

[FPWGaming]

If asked for the p.d. for those questions at the end is it okay to leave the answer in eV? Or does it want just V?

[Grimreaper-zttt]

at 7.45, isn't the distance of the S/L triangle meant to be vt' not vt? as the time they see the train moving for is t' not t?

[dulgsvc]

How do you get t=t0/(√(1-(v^2/c^2)) from 2/c[√(vt/2)^2+L^2] 9:01

[dunsel]

so they zeroed out the experiment in the condition it was to be tested in, the rotating, orbiting Earth, isn't that like standing on a scale and setting it to zero to get your weight?

[User-eikw]

3:43 Didnt you say one of the mirrors was moved back so the distance isnt the same?

[MrMas]

Amazing video! Any chance you can cover the AQA optional module Astrophysics? :)