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Physics P3

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Reply 140

billet-doux

I do! Whoops, my bad. See, that's what studying Physics does to you!

Reply 141

John Locke

piece_by_piece

Concave mirror: the nature of the image is dependent on the distance of the object from the mirror.
If the object is at C (2F), the image will be the same size, real and inverted.
If the object is beyond C, the image will be diminished, real and inverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be enlarged, virtual and upright.

Convex mirror: there is only one rule. The image is always diminished, virtual and upright.

Converging lens (convex): the nature of the image is dependent on the distance of the object from the lens.
If the object is at C, the image is the same size, real and inverted.
If the object is beyond C, the image is diminished, real and inverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be enlarged, virtual and upright.

Diverging lens (concave): there is only one rule. The image is always diminished, virtual and upright.

Very Nice

.

In reference to who asked, the best way of doing ray construction is to learn how to draw the diagrams, and to practice that. Its easier in the exam to do a quick 5 second sketch than to memorize all this in words, plus you can be asked to do the drawings too!

Reply 142

Mr Nonsense

piece_by_piece

Concave mirror: the nature of the image is dependent on the distance of the object from the mirror.
If the object is at C (2F), the image will be the same size, real and inverted.
If the object is beyond C, the image will be diminished, real and inverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be enlarged, virtual and upright.

Convex mirror: there is only one rule. The image is always diminished, virtual and upright.

Converging lens (convex): the nature of the image is dependent on the distance of the object from the lens.
If the object is at C, the image is the same size, real and inverted.
If the object is beyond C, the image is diminished, real and iverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be elarged, virtual and upright.

Diverging lens (concave): there is only one rule. The image is always dimished, virtual and upright.

genius - thank you so much
on my +rep list...

Reply 143

billet-doux

Yeah, it is definitely easier to do a sketch because then you familiarise yourself with the diagram, thus enabling you to do it in the exam :smile:

I've memorised the entire textbook, I hope that gets me the A I need to get an A*! *fingers crossed*

Reply 144

billet-doux

hughey

genius - thank you so much
on my +rep list...

You're welcome! Glad I could be of some use :p:

Reply 145

John Locke

piece_by_piece

Yeah, it is definitely easier to do a sketch because then you familiarise yourself with the diagram, thus enabling you to do it in the exam :smile:

I've memorised the entire textbook, I hope that gets me the A I need to get an A*! *fingers crossed*

:dito: Its the same for me, *crosses fingers too*. Come on 85 :smile:

Reply 146

billet-doux

John Locke

:dito: Its the same for me, *crosses fingers too*. Come on 85 :smile:

I need 80; come on 80, or else I will cry!

Reply 147

definite_maybe

piece_by_piece

Concave mirror: the nature of the image is dependent on the distance of the object from the mirror.
If the object is at C (2F), the image will be the same size, real and inverted.
If the object is beyond C, the image will be diminished, real and inverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be enlarged, virtual and upright.

Convex mirror: there is only one rule. The image is always diminished, virtual and upright.

Converging lens (convex): the nature of the image is dependent on the distance of the object from the lens.
If the object is at C, the image is the same size, real and inverted.
If the object is beyond C, the image is diminished, real and iverted.
If the object is between F and C, the image will be enlarged, real and inverted.
If the object is closer than F, the image will be elarged, virtual and upright.

Diverging lens (concave): there is only one rule. The image is always dimished, virtual and upright.

Thanks for that. I need a B out of this exam to get an A* but seriously doubting I will. I just don't get these ray diagrams. Hopefully memorising this will help.

Reply 148

billet-doux

definite_maybe

Thanks for that. I need a B out of this exam to get an A* but seriously doubting I will. I just don't get these ray diagrams. Hopefully memorising this will help.

You're welcome sweetie. I'm sure you'll get a B! The grade boundaries are pretty low anyway, don't worry :smile:

Reply 149

John Locke

definite_maybe

Thanks for that. I need a B out of this exam to get an A* but seriously doubting I will. I just don't get these ray diagrams. Hopefully memorising this will help.

Don't get too hung up on ray diagrams, remember its only one part of the syllabus and theres plenty more to revise if you haven't already. For all we know, this might not even come up tomorrow, and even if it does, you could probably still get a B if you missed it out :p:

especially based on the boundaries in Jan!

Reply 150

trance addict

I need 97 marks. Hmmm.. I think I could do it :smile:

(with A LOT of luck on my side)

Reply 151

kirie15

I need 80 on p3 and 80 on p2!
I hope the grade boundaries are low.
I want that A* or A

Reply 152

ThisCantBeChanged

rach.

Ahh, no wonder. This thread is about P3 AQA and I'm doing edexcel360 :p:

lol, I was thinking when reading this thread I dont know any of this lol then i realised it was AQA, im doing edexcel 360 too. gah hate physics.

Reply 153

username195537

i think i only need 70 :biggrin:

.

only dropped 10 marks on P1a, P1b, P2, and ISA so can affored to lose thirty. Good luck to everyone tomorrow

Reply 154

jack/ten

hey can someone help me on page 185 of the physics extention unit 5? iv got my exam tommorow and i dont understand the section at the top when it says:

matching the frequency of the acclerating voltage pulses to the rate of rotation of the particles.

how does this overcome the spiralling effect of the partcles?
help needed urgently thanks :smile:

Reply 155

ThisCantBeChanged

dc4oaks

Im doing Edexcel 360 Science, Physics p3 Topic 5 & 6 tomorrow

Im somehow on an A for it, after doing 70% of the course

Anyone know what sort of mark I'd need to keep an A?
And is anyone else doing the same exam as me :confused:

Because I don't have a clue about the stuff being talked about in here.

Thanks

woops i just spent most of the day only revising p3 topic 6 and only realised now there was a topic 5 arrrgh

Reply 156

ThisCantBeChanged

for the edexcel 360 exams how much are each of the b3 c3 and p3 exams worth? like the b2 c2 and p2 are 10% each so how many percent are the b3, c3 and p3?