AQA AS Physics Unit 2 (PHYA2) June 9th 2016 Resit paper

For the last ray I drew it refracted away from the normal because it was going from more optically dense to less, is this wrong?

Any chance of an unofficial mark scheme?

The grating question....did you see the blue light first?

I put that too....but it was 3 marks so i said amplitude stays the same.....ive never even heard of a question that relates wavelength to amplitude

(a)Centre of mass is point where a single force can be applied with no turning effect.

(b)196N or round to 200N

(c) it can't support the boy. Took moments from the embankment

What i fully put:
Increasing the frequency leads to a decrease in wavelength
a decrease in wavelength leads to a decrease in width of the "fringe"
so therefore the distance AB would decrease.

Not too sure about the amplitude too, it was a very weird 3 mark question, did they not say the Amplitude remained the same in the question? I may be wrong about this.

This is how I drew it:

Amplititude stayed the same it said it the question. I put frequency increases so wavelength decreases, therefore fringe width decreases and because it was 3 marks I just guessed and wrote they would be more intense lol.

Does anyone else feel like they haven't got their grades for uni now

Me i need a C for Physics and i think i messed that up too, im legit depressed now

not doing this paper but i know someone who is, what's the general consensus?

I needed an A! and only got a low B last year was hoping to get near 100% in this

Amplititude stayed the same it said it the question. I put frequency increases so wavelength decreases, therefore fringe width decreases and because it was 3 marks I just guessed and wrote they would be more intense lol.