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The Physics PHYA2 thread! 5th June 2013

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Amm.. In my revision book, it says partial internal reflection occurs when incident angle is less than or equal to the critical angle. I have nelson thornes and it is for AQA exam board only. :smile:

Oh... I got the same textbook so had a look and yeah, you were right. :colondollar:

I haven't seen any questions in past papers on that though...

Reply 801

h94k

Original post by StalkeR47

like this! The bottom spectrum. :smile:

Thank you so much! Exactly what i was looking for :smile:

Reply 802

Bethj1234

Does anyone have a list of all the experiments they could potentially ask us about?

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Reply 803

BigBadJFly

Original post by Jack93o

so you would only get partial reflection if the angle of incidence is exactly equal to the critical angle?

what if the ray is refracted through, do you still get a bit of reflection?

Yes, but not much (second question)

(edited 10 years ago)

Reply 804

StalkeR47

Original post by Jack93o

so you would only get partial reflection if the angle of incidence is exactly equal to the critical angle?

what if the ray is refracted through, do you still get a bit of reflection?

No, you get partial internal reflection when the incident angle is less than or equal to the critical angle. And you get total internal reflection when the incident angle is bigger than the critical angle. Is that clear?

Reply 805

StalkeR47

Original post by BigBadJFly

Oh... I got the same textbook so had a look and yeah, you were right. :colondollar:

I haven't seen any questions in past papers on that though...

HAHA. It is ok.

Reply 806

x-Sophie-x

Original post by masryboy94

ooo i can tell miss overlord !! lool :P

Wow, it's changed xD Didn't realise that :L

Reply 807

StalkeR47

Original post by h94k

Thank you so much! Exactly what i was looking for :smile:

No probs!

Reply 808

danlocke

Predictions?

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Reply 809

StalkeR47

Original post by danlocke

Predictions?

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Yes of course! Everything will come up (I predict). So, you will have to revise everything. :smile:

Reply 810

Substitution

can someone help with this I thought I would use sinx=opp/hyp but they used something different

image.jpg443.0KB

Reply 811

SortYourLife

PAST PAPER MARKS:

Jan 10: 58 - 116 UMS
June 10: 60 - 120 UMS
Jan 11: 59 - 114 UMS
June 12: 62 - 120 UMS
Jan 13: 54 - 105 UMS

Hoping papers nicer than the Jan 13 one. Last question wasn't nice

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Reply 812

Felix Ivers

Does anyone have a model answer for any of the 6 markers on waves ie slits, diffraction gratings or stationary? As soon as I see a question asking me to explain what happens my head goes blank!

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Reply 813

StalkeR47

Original post by BenChard

can someone help with this I thought I would use sinx=opp/hyp but they used something different

What is the question? I can only see the diagram and it is up-side-down.

Reply 814

Jimmy20002012

Original post by StalkeR47

Yes of course! Everything will come up (I predict). So, you will have to revise everything. :smile:

Sorry to both you again :wink:

On jan 13 paper on 2bi, how do you work out the weight component?

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Reply 815

Substitution

Original post by StalkeR47

What is the question? I can only see the diagram and it is up-side-down.

sorry it's show the component of the weight along the slope is 0.06

Reply 816

StalkeR47

Original post by SortYourLife

Jan 13 last q? Common! It was the easiest question. But you are doing really well! Keep it up! :smile:

Reply 817

Raimonduo

Original post by Jimmy20002012

Sorry to both you again :wink:

On jan 13 paper on 2bi, how do you work out the weight component?

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You wanna try to draw a triangle, with the weight as the hypotenuse, then you should be able to work out the angle and thus, the component parallel and perpendicular to the plane.