Refraction & TIR - A-level & GCSE Physics (full version)

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Science Shorts

Science Shorts

Күн бұрын

Пікірлер: 92
@joenash338
@joenash338 5 жыл бұрын
Mate you’re seriously saving my physics a level thank you so much
@sameerhussain3562
@sameerhussain3562 4 жыл бұрын
what did u get in the exam
@youthanki6188
@youthanki6188 4 жыл бұрын
Sameer Hussain a C for Corona
@officialcatchingair1932
@officialcatchingair1932 4 жыл бұрын
A level, what I’m doing this in year 8
@PanzerSoldier
@PanzerSoldier 4 жыл бұрын
Official CatchingAir topics are repeated and made much harder.
@hayfordsarfo1646
@hayfordsarfo1646 3 жыл бұрын
@@officialcatchingair1932 LMAO that means ur year 11 & a level content is going to be HEFTY
@iSteelRazorBladeGAMING
@iSteelRazorBladeGAMING 7 жыл бұрын
Just went on a marathon through all your AS topics. Safe to say you have me covered. Thanks.
@alii7520
@alii7520 6 жыл бұрын
SteelRazorBlade // AdamSRB Good Luck in your A2 exams
@zidans4956
@zidans4956 5 жыл бұрын
SteelRazorBlade // AdamSRB how did it go? Were his videos enough revision?
@Awai_quotes
@Awai_quotes 3 жыл бұрын
@@zidans4956 where is was enough?
@timothychinye6008
@timothychinye6008 2 жыл бұрын
Guys, no it's not "enough". If you want a good grade, your best is to revise all the topics, do a fk ton of past and practise papers and study the mark schemes... Only then are you likely to get a good grade. So, Science Shorts (and I guess; CGB Books, Physics Online, etc) will only get you a third of the way. You need to do the past & practise papers to get you familiar with the questions you'll probably be asked and how they want you to ask them, as well as the amount of time to spend on each questions, etc. And you need to study the mark schemes because, each exam board is different, e.g; acceleration of gravity is 9.8 ms^-1 for some exam boards and 9.81 ms^-1 for other (and 10 ms^-1 for some math exam boards). Most physics tutorials tend to go for the most common exam boards; Edexcel for Maths, AQA for Sciences so you need to make sure - even though physics is physics, you're answering the questions in a way that the Exam Boards want you to.
@connor-y1x
@connor-y1x 2 жыл бұрын
@@timothychinye6008 'enough' is basically what it means to pass, so yes you would pass with these videos.
@sea5205
@sea5205 5 жыл бұрын
Best channel for a level physics!
@gecko2023
@gecko2023 2 жыл бұрын
something my physics taught me which is quite useful for remembering the light bending thing, FAST, fast away slow towards
@joshvir262
@joshvir262 5 жыл бұрын
video number 4. 2 days before exam
@arooshatariq5573
@arooshatariq5573 4 жыл бұрын
nice
@KGTKK
@KGTKK 7 ай бұрын
Same!😂
@yeety1208
@yeety1208 7 ай бұрын
more like 2 hours 😂
@ea9814
@ea9814 3 жыл бұрын
At 18:02 when he said 'red light green light', that hit different.
@kaaruni
@kaaruni 3 жыл бұрын
lmao
@puddleduck1405
@puddleduck1405 2 жыл бұрын
lmfaooo yeah
@deadshot3968
@deadshot3968 3 жыл бұрын
I actually love you so much I was struggling so much with waves and now while watching your videos everything has clicked just 4 days before waves tests wish me luck and thank you. Currently have got 100% test in chemistry and 2 95%ish tests in maths, and now hopefully I get at least 75% in physics. (aiming for oxbridge )
@noorahmadlondon
@noorahmadlondon 2 жыл бұрын
damn this quote has power!
@__maria2509
@__maria2509 Жыл бұрын
did u get into oxbridge??
@Nightfall-x5k
@Nightfall-x5k 2 ай бұрын
did you get into oxbridge?
@gerardaslisauskas1217
@gerardaslisauskas1217 7 ай бұрын
Best explanations so far out of any videos, thank you so much.
@jolyonsage8616
@jolyonsage8616 4 жыл бұрын
Where tf have u been my whole school career
@folbfolb
@folbfolb 3 жыл бұрын
How is his voice so deep in some videos compared to others
@akirabalaba
@akirabalaba Жыл бұрын
i know right
@user-cl1fz1sc2c
@user-cl1fz1sc2c 6 жыл бұрын
wait does this mean it's actually energy being refracted reflected and diffracted. Since a wave is an energy transfer.
@naheemahakinwale8403
@naheemahakinwale8403 5 жыл бұрын
At 8:38, you say light wants to get away from the normal but it is moving towards the normal?
@7490maddie
@7490maddie 5 жыл бұрын
as in the faster light is going, the more it can get away from it like a race - this confused me too at first
@justnarvi..
@justnarvi.. 3 жыл бұрын
Some plz help, 14:40 how did he get sin90 and then why did he just bar it off? :(
@keranveermann9418
@keranveermann9418 3 жыл бұрын
The 90 degrees is the refractive angle, it travels along the boundary. So he used the equation n1sini = n2sinr he subbed in 90 which is r. Sin 90 on your calculator is equal to one so theres no need for it. Anything multiplied by one stays the same. I hope this helps please say if you got this or not.
@justnarvi..
@justnarvi.. 3 жыл бұрын
@@keranveermann9418 thank you soooo much
@coffinman4527
@coffinman4527 7 ай бұрын
actually helped a ton! thanks!
@georgedickson6550
@georgedickson6550 4 жыл бұрын
very good video! thank you very much. I should just mention that you probably shouldn't put exclamation marks after values or constants because it looks like you mean factorial. but its a perfect video and very useful
@steevoo
@steevoo 7 жыл бұрын
How are pulses exactly stretched in multipath dispersion?
@davidpacker7602
@davidpacker7602 6 жыл бұрын
light can start at the end of the cable at any angle, if it went straight down the middle of the cable it would arrive at the end earlier than light which started wonky and bounced of the sides multiple times meaning it had to travel a longer distance
@magn8195
@magn8195 7 жыл бұрын
This helped so much!!
@v3lar110
@v3lar110 5 жыл бұрын
this is so good keep it up !!!!!
@jacllwyd5000
@jacllwyd5000 Жыл бұрын
How would I calculate the refractive index of the cladding?
@naheemahakinwale8403
@naheemahakinwale8403 5 жыл бұрын
With the car illustration, you mean there is mor friction on grass not less friction right?
@justinsankar1164
@justinsankar1164 5 жыл бұрын
Yea
@adnansakeeb739
@adnansakeeb739 3 жыл бұрын
No he meant less friction, thats why he said skid...
@thedemongodvlogs7671
@thedemongodvlogs7671 3 жыл бұрын
Why is it m/s ‐¹ ?
@zeroitedono2547
@zeroitedono2547 4 жыл бұрын
why for relative refractive index is 1n2=v1/v2=n2/n1?
@TinieTekkerzZ959
@TinieTekkerzZ959 5 жыл бұрын
Good luck AQA people tomorrow🤞🏻
@ActuallyAudacity
@ActuallyAudacity 5 жыл бұрын
Thanks!
@excelmaths4889
@excelmaths4889 5 жыл бұрын
Thank you !
@arsal16
@arsal16 3 жыл бұрын
how your paper went tho?
@lewismacpherson395
@lewismacpherson395 6 жыл бұрын
What's the difference between multipath, modal and material dispersion? Thanks.
@emilytaylor1781
@emilytaylor1781 4 жыл бұрын
Modal and material dispersion are types of multi path dispersion Modal caused by light waves entering the fibre at different angles which causes pulse broadening as rays take diff times to reach the end of the fibre Material dispersion is when light wit diff wavelengths are used which means that the light rays will be travelling at diff speeds which also leads to pulse broadening
@eyerusamber165
@eyerusamber165 3 жыл бұрын
Thank you this helped so much
@peterleveillee1321
@peterleveillee1321 Жыл бұрын
At 2:20 you say the light slows down and the frequency increases. That is not correct for going straight through the normal like the picture shows. It does slow down but the frequency stays the same.
@ScienceShorts
@ScienceShorts Жыл бұрын
Did I say that though...? 🤔
@peterleveillee1321
@peterleveillee1321 Жыл бұрын
@@ScienceShorts yes, "wavelength getting smaller"
@ScienceShorts
@ScienceShorts Жыл бұрын
You said that I said "frequency increases" - I did not. I did say that wavelength decreases, because that is true.
@hasty6809
@hasty6809 2 жыл бұрын
absolute legend
@PlainVlogs
@PlainVlogs 4 жыл бұрын
Can we used n=sinθ1/sinθ2 for materials which arent air? such as glass and water?
@alialmeerahmed6994
@alialmeerahmed6994 2 жыл бұрын
no
@fellowmemer5693
@fellowmemer5693 Жыл бұрын
​@@alialmeerahmed6994yes you can? We literally can
@zeroitedono2547
@zeroitedono2547 4 жыл бұрын
why is n1 sin theta 1= n2 sin theta 2 , you said something about substituting n=1 *(refractive index for air) but am still confused i understand the rest of this topic though.
@emilytaylor1781
@emilytaylor1781 4 жыл бұрын
The n1sinθ1=n2sinθ2 is snells law, there’s a whole massive derivation thingy that you don’t need to know for a level, n =1 for air as the we for refractive index is n = c(speed in vacuum)/ speed in medium so for air that’s 3*10^8 / 3*10^8 which is one
@zeroitedono2547
@zeroitedono2547 4 жыл бұрын
@@emilytaylor1781 thank you very much i overcomplicated it lol i thought he substituted n=1 into snells formula and it seemed confusing
@mahmudjahed7355
@mahmudjahed7355 2 жыл бұрын
can u make a video on Dispersion and btw your vids are super helpful
@hadishandai1182
@hadishandai1182 6 жыл бұрын
thanks very helpful tutorial
@fizazaman8580
@fizazaman8580 5 жыл бұрын
You save my grades
@yuki002x
@yuki002x 7 ай бұрын
is this even in the syllabus?
@yuki002x
@yuki002x 7 ай бұрын
@@ScienceShorts I mean A-levels 2024 syllabus?
@Aly_jaf
@Aly_jaf 5 жыл бұрын
Subscribed
@waleedoo
@waleedoo 6 жыл бұрын
sir I have a question, I did a multiple choice question where it said that a condition for total internal reflection to occur was that the wavelength in medium 2 must be bigger than in medium 1 , why is that?
@samtaylor4680
@samtaylor4680 6 жыл бұрын
When light passes into another medium, the frequency always stays the same. For TIR light must pass from a more optically dense to a less optically dense material. higher RI -> lower RI. If the light passes from medium 1 to medium 2, the speed must increase. c=fλ , as f is constant, c is proportional to λ. So if there is to be TIR, light would have to travel faster in medium 2, which in turn means have a bigger wavelength (λ).
@waleedoo
@waleedoo 6 жыл бұрын
Sam Taylor thanks 👍
@samtaylor4680
@samtaylor4680 6 жыл бұрын
waleed hamad bit late of a reply, but hopefully that helps with exams just round the corner :)
@geofreymhomela1618
@geofreymhomela1618 5 жыл бұрын
Nice video
@rayhanulchowdhury3560
@rayhanulchowdhury3560 4 жыл бұрын
thanks mate
@imasha7315
@imasha7315 4 жыл бұрын
You’re a G
@jfernandes_25
@jfernandes_25 3 жыл бұрын
Hi sir, I've done an exam question where you had to continue a ray after it hits cladding and it says it hits at the critical angle(2 marks) So I did a line at the boundary and got a mark however why is it you need to show reflection as it is not totally internally reflecting is it? Thank you. Edit: why do you need to show reflection for the second mark.
@adrianjonsson2581
@adrianjonsson2581 4 жыл бұрын
amazing explanation
@Darkknight9035
@Darkknight9035 5 жыл бұрын
I think I just lost my mind
@fahad_hassan_92
@fahad_hassan_92 2 жыл бұрын
Mannnnnnnnnnnnn thanksssssssssssssss a lot
@_aidid
@_aidid 5 жыл бұрын
Ads are annoying in this video
@ScienceShorts
@ScienceShorts 5 жыл бұрын
3 skippable ads in a 20 minute video that you can watch for free?! *gasp*
@justinsankar1164
@justinsankar1164 5 жыл бұрын
#rekt
@CreamySun582
@CreamySun582 5 жыл бұрын
>makes free content saving thousands of A-Levels >complains when 5 second ad appears Bruh
@Munman-69
@Munman-69 4 жыл бұрын
shush
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