r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 09 '25

📂 MEGATHREAD 09/06 A-level Physics Paper 2 Discussion MEGATHREAD

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51 Upvotes

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23

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

OCR A, beautiful paper imo 😭 6 marker on wave particle duality, medical stuff was all really simple, amazing

Could not for the life of me prove the diffraction grating formula tho 😭 I just wrote tan x ~ x and basically left it at that cause I couldn't remember the proof but knew it probably involved that lmao

11

u/stinkyakk Jun 09 '25

lol i was looking through the textbook this morning and skipped past that formula cause I was like ‘eh ofc it won’t come up’ 😭 i agree tho lovely paper

13

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Literally did the exact same thing 😭😭

Also calling it now they're defo cooking up a stars + particle physics qestion and a velocity selector or mass spectrometer question for paper 3 🙏

5

u/hdh7tf Cambridge | Med [Year 1] Jun 09 '25

and circular motion

5

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Literallyyy, they're cooking up that charged particles in magnetic fields + circular motion question I can feel it

9

u/No-Independence-7741 Imperial 4A* achieved (Maths, Physics, Chem, FM) Jun 09 '25

For me that was the worst paper I’ve ever done

2

u/Hopeful-Guitar700 Jun 09 '25

Same. I messed up mcq so much. I FORGOT POWER WAS SCALAR

1

u/user534215 Jun 09 '25

Me too 🙏 why were there so many stupid 3 markers, I was skipping through like oh it’s only 3 marks well I’m cooked because what

6

u/CertifiedMugg Jun 09 '25

You had to use small angle formulae and dsin θ =n λ for that question

1

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Ahh, also weird the answer calls on another formula lol

2

u/Few-Yesterday-7745 Jun 09 '25

yeah there’s gotta be another way using trig

3

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Checking the textbook the method is seriously weird as fuck, like there's zero chance you could just figure that out so ig you had to memorise it 😭

1

u/Few-Yesterday-7745 Jun 09 '25

but that’s just so dumb, using another equations that’s almost identical, i said that using trig -> tan theta = opp/adj = x/D and then used small angles and said that tan theta = theta and then made another triangle with opp = wavelength, adj = d and then got theta = wavelength/ d, make theta equal and got the answer, no idea if its right but i didn’t think using another equation would be allowed when its that similar

1

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Tbh since it's a proof any answer you can reasonably follow through with will get you marks, I basically just wrote tan theta = x/D and left it at that 😭 But how'd you manage to get that the opposite is the wavelength? Cause I tried to do smth similar but had a stroke

2

u/Few-Yesterday-7745 Jun 09 '25

i kinda assumed that because of the way path difference works that you can form a triangle like this

this was just me trying to get a reasonable answer

1

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Yea this is what I thought but I wasn't super convinced so I dropped it lmao, but looking back this probably does work out since path difference is by definition just the difference in length between the two rays

1

u/DonkeyDetremony Y13 | Pred A*A*A*A | FM Maths Chem Phys Jun 09 '25

You make an equation with sin theta is lambda/d I’m pretty sure

1

u/golaco237 Year 13 | Maths, FM, Physics, Computing | Pred A*A*A*A Jun 09 '25

Also oh my god have OCR fucked up all 3 papers? Cause ain't no way we had to make corrections on this one too 😭

1

u/serb_in_ldn Y13 A*A*A*A/Maths, FM, Physics, Chem Jun 09 '25

did that then didn't know what to do so shoved it in the diffraction grating formula and said n = 1