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# The Physics PHYA2 thread! 5th June 2013 Watch

• View Poll Results: What mark do you think you got out of 70?
0-20
6
3.00%
21-40
12
6.00%
41-50
29
14.50%
51-60
79
39.50%
61-70
74
37.00%

I thought it did reflect for 5d?
Explain?

This is what I remember
Attached Images

2. (Original post by t-mister)
I hope the grade boundaries are quite low this year as I do not think I got higher than 50. Are you planning on going to uni?
Yeah I want to go to Oxford! What about you
3. (Original post by february-girl)
Full marks will probs 70 :-) like I said, it was not a difficult paper... Absolute beauty of a paper in fact!

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There's no way it'll be 70.
4. (Original post by .raiden.)
Explain?

This is what I remember
However the normal was at a a angle of 22 to the triangle you just drew so the actual angle of incidence is 22+ the angle of incidence you thought you got and therefore it is around 53>critical angle
5. (Original post by .raiden.)
Explain?

This is what I remember
No you had to add 30 to 22 to get 52, which is greater that the critical angle (50 or something), therefore it reflected
6. (Original post by Aarongreatbanks)
Yeah I want to go to Oxford! What about you
I want to go either Britsol or Warwick, my strongest subject is Maths so hopefully to do that as a degree. Good luck to you
7. (Original post by .raiden.)
Explain?

This is what I remember
yep that is what i got !! except that it refracted away from normal because it went into an optically less dense material
8. (Original post by ccashman)
Who found this paper harder than January 2013?
the grade boundary for an A was 50 for Jan 13, what do you reckon this ones will be?
I think 120 UMS will be 63, so maybe 53 for an A
9. (Original post by t-mister)
I may be wrong, but we won't know until the mark scheme comes out
(Original post by .raiden.)
Explain?

This is what I remember
You're diagram misses the part where the normal is an extra 22 degrees off bringing it over the critical angle. In fairness their diagram was confusing.
10. (Original post by Aarongreatbanks)
However the normal was at a a angle of 22 to the triangle you just drew so the actual angle of incidence is 22+ the angle of incidence you thought you got and therefore it is around 53>critical angle
I don't know which angle you're talking about? What is 22?
11. (Original post by trentjoseph007)
I think everyone realised? I haven't seen any respond to it as if it were a double slit question.

OK so what would ur answer be?
For the very last part of the question?
(Original post by Aarongreatbanks)
No problem.
That's what I thought ?
Yeah but you have to mention what type of seismic wave it is. Is it a primary or secondary
13. what do you think grade boundaries will be like
14. (Original post by .raiden.)
Explain?

This is what I remember
the diagram is wrong ... the normal was already drawn for u with a extra 22 degrees.
15. (Original post by trentjoseph007)
the diagram is wrong ... the normal was already drawn for u with a extra 22 degrees.
Can someone draw it?
16. (Original post by .raiden.)
Explain?

This is what I remember
There was an extra angle on the diagram

so it was actually
17. (Original post by t-mister)
I want to go either Britsol or Warwick, my strongest subject is Maths so hopefully to do that as a degree. Good luck to you
Same here! Bristol is one of my options as I live here!
18. (Original post by HenryD)
For the very last part of the question?
YES.
19. (Original post by Goods)
There was an extra angle on the diagram

so it was actually
Hmm I don't think I really looked for this extra angle
20. (Original post by .raiden.)
I don't know which angle you're talking about? What is 22?
you had to add 30 (you were given this) and 22 (had to work this out - think there was an isosceles triangle or something) to get the angle of incidence (52)

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