The Physics PHYA2 thread! 5th June 2013

Same, I think it might come up. It would be 3-4 marks I think. They both travel but stationary wave travel in opposite direction.

Yes. That give you 2-3 marks.

Distance between slits. They won't expect you to use anything else (like distance between orders)

No m8. d is the slit spacing. and big D for w=lambda D/s is the distance between the screen and the slits.

how does diffraction grating work?

Thanks

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I reckon out 6 marker might even be something like this, like comparative. The unit 1 was comparing leptons or something so you never know...

I reckon out 6 marker might even be something like this, like comparative. The unit 1 was comparing leptons or something so you never know...

Yeah you are right! It could be.

Thats true. What would be great is a 6 marker stating and explaining newtons laws (1 mark for stating 1 for explaining each). They've shown that they'll put any topic in the 6 markers like in unit 1, so you never know!

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Thats true. What would be great is a 6 marker stating and explaining newtons laws (1 mark for stating 1 for explaining each). They've shown that they'll put any topic in the 6 markers like in unit 1, so you never know!

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Crapppp that'd be so gay. They are actually starting to repeat the 6 markers now because they've done so many which is what they did with unit 1 so I actually think it could be comparative.

When are you going to sleep m8? I will go at 12 am.

Actually, unit 1 6-marker was very unexpected. This is because they had no choice but to repeat a previous 6 marker. So, they gave a new thought. I am guessing unit 2 6 marker would also be a new thought. So scared.

When I get tired enough. Been struggling to sleep recently with it being a bit warmer, no point wasting time trying to sleep if it's not gonna happen :P if I could fall asleep straight away I'd go now!

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Ahh cool. But I suggest you to take at least 3-4 hours sleep before the exam. You will feel fresh and active.

Exactly! When I saw that 6 marker I was just like 'wtf' where'd you get the 6 marks from?! I mean it looked easy but...
I'm confident they'll do the same on this one as Im guessing it's the same guy that makes them? If it is really crap im gonna be so pissed, it has to be our ones that they change it doesnt it?!

The first slit polarises the light and makes it coherent. I think a laser has the same effect so you only use the first slit of you're using a lamp;it's not necessary with a laser light. I'm pretty sure that's how it works...

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