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ocr physics past paper

Anyone know where I can get past papers for physics OCR (including mark scheme). Ive got my exam tomorrow, so a quick reply would be appreciated :biggrin: Tbh, I just need the mark schemes because Ive got many Past papers, just no answers to check :mad:
Thanks

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SolidSnake
Anyone know where I can get past papers for physics OCR (including mark scheme). Ive got my exam tomorrow, so a quick reply would be appreciated :biggrin: Tbh, I just need the mark schemes because Ive got many Past papers, just no answers to check :mad:
Thanks

Hi, i'm doing wave properties too.

One question.

Speed in medium 1
3*10^8ms^-1

Speed in medium 2
1.9*10^8ms^-1

Refractive index for light passing from medium 1 to medium 2 = 1.58?
Reply 2
Avatar for El Stevo
El Stevo
11
[QUOTE="Widowmaker"]Hi, i'm doing wave properties too.

One question.

Speed in medium 1
3*10^8ms^-1

Speed in medium 2
1.9*10^8ms^-1

Refractive index for light passing from medium 1 to medium 2 = 1.58?[/QUOTE

yes... refractive index = speed in medium leaving/speed in medium entering
[QUOTE="Stevo" El="El"]
Widowmaker
Hi, i'm doing wave properties too.

One question.

Speed in medium 1
3*10^8ms^-1

Speed in medium 2
1.9*10^8ms^-1

Refractive index for light passing from medium 1 to medium 2 = 1.58?[/QUOTE

yes... refractive index = speed in medium leaving/speed in medium entering

1 other quick question.
Why is a large critical angle needed for data transmission?
Suggest why a large critical anglem results in a weak light pulse travelling down the core.
Widowmaker
Hi, i'm doing wave properties too.

One question.

Speed in medium 1
3*10^8ms^-1

Speed in medium 2
1.9*10^8ms^-1

Refractive index for light passing from medium 1 to medium 2 = 1.58?

Yes as n = Vi / Vr
Reply 5
Avatar for El Stevo
El Stevo
11
Widowmaker
1 other quick question.
Why is a large critical angle needed for data transmission?
Suggest why a large critical anglem results in a weak light pulse travelling down the core.


1.) for total internal refraction to occur
2.) travels further so loses strength
thanks a lot el stevo.
El Stevo
1.) for total internal refraction to occur
2.) travels further so loses strength



And it's basically because there is a greater portion of light totally internally reflected
Reply 8
Avatar for SolidSnake
SolidSnake
OP
lol Im not doing wave properties, but if I remember correctly, isnt it also to prevent light escaping the actual wire? But back to my original question, any mark schemes :biggrin:
Good luck to all tomorrow!
Reply 9
Avatar for El Stevo
El Stevo
11
check your pm's... or pm me with the ones you want... i have access to some but you wouldn't have access to them if i simply gave you the link..
Reply 10
Avatar for chats
chats
2
anyone doing the A2 paper next week?
Reply 11
Avatar for El Stevo
El Stevo
11
chats
anyone doing the A2 paper next week?


Module 4? Me...
Reply 12
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chats
2
El Stevo
Module 4? Me...


is that forces fields and energy?

I'm doing module 5- health physics (thats the option my college chose)

Good Luck!
Reply 13
Avatar for El Stevo
El Stevo
11
chats
is that forces fields and energy?

I'm doing module 5- health physics (thats the option my college chose)

Good Luck!


yeh... my module 5 is gonna be nuclear, only we sitting that in june...
Reply 14
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chats
2
El Stevo
yeh... my module 5 is gonna be nuclear, only we sitting that in june...


I wanted to do nuclear or telecommnications but they chose health because its supposed to be the least demanding :rolleyes: still quite interesting though :smile:
Yo chats, el stevo.
What marks did you get for wave properties physics and p1 maths?
Reply 16
Avatar for El Stevo
El Stevo
11
p1 maths - 100%
wave properties physics - 72% - messed up the practical...
Reply 17
Avatar for El Stevo
El Stevo
11
chats
I wanted to do nuclear or telecommnications but they chose health because its supposed to be the least demanding :rolleyes: still quite interesting though :smile:


we got the choice of either cosmo or nuclear... i went nuclear...
Reply 18
Avatar for chats
chats
2
Widowmaker
Yo chats, el stevo.
What marks did you get for wave properties physics and p1 maths?


p1- 76/100 (gonna retake)
wp- 98/120
Reply 19
Avatar for El Stevo
El Stevo
11
chats
p1- 76/100 (gonna retake)
wp- 98/120


ums-wise... 100, 86...

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