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OCR Gateway Physics P4P5P6 - 18/06/13

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Reply 500

NatashaG

^^ My current frame of mind about tomorrow -_-

Reply 501

Elcor

Original post by BP_Tranquility

They do

-Polarisation can only happen when light acts as a wave
-When you have two slits, then this evidences that light acts as a wave (an interference pattern can only caused by a wave)
-Therefore, you can only find the path difference using the wavelength when light acts as a wave (you find the path difference to see if there is constructive and destructive interference).
-When light acts as a wave, then it slows down in a prism. If it acted like a particle, this effect wouldn't happen.

Hopefully, they won't ask a question like that in the exam :redface:

Diffraction is another quality of light which is unique to waves. :redface:

Oh and the refraction in the prism can happen with particles too - don't ask me why.

Reply 502

BP_Tranquility

Original post by andersson

Diffraction is another quality of light which is unique to waves. :redface:

Oh and the refraction in the prism can happen with particles too - don't ask me why.

Yes, particles can refract in a prism but instead of slowing down, they speed up (I guess it's the same effect as how sound waves, which are particles, travel quicker through solid, denser objects where the particles are closer together) :wink:

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(edited 10 years ago)

Reply 503

dazzer19

Me Vs Physics Paper...

...you will be blinded by my pure awesomeness

image.jpg133.6KB

Reply 504

Knowing

Do we actually need to know how a diode works? Or do we just need to know it only allows the current to pass through in one direction?

Reply 505

BP_Tranquility

Original post by Knowing

Do we actually need to know how a diode works? Or do we just need to know it only allows the current to pass through in one direction?

Yes, we need go know how a diode works- in terms of p type/n type silicon, holes/electrons etc :smile:

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Reply 506

L'Evil Fish

Original post by BP_Tranquility

Answers attached :smile:

-P4-

ImageUploadedByStudent Room1371499487.634212.jpg

-P5-

ImageUploadedByStudent Room1371499501.194392.jpg

ImageUploadedByStudent Room1371499514.060868.jpg

-P6-

ImageUploadedByStudent Room1371499559.537592.jpg

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Thanks a lot

I dont understand bridging circuits at all

Reply 507

BrokenS0ulz

Original post by NatashaG

^^ My current frame of mind about tomorrow -_-

I feel this too...
The physics exam to me tomorrow will be like this: :bricks:

Reply 508

ryanb97

Original post by L'Evil Fish

Thanks a lot

I dont understand bridging circuits at all

Me neither... Gna wing that bit :sexface:

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Reply 509

L'Evil Fish

Original post by ryanb97

Me neither... Gna wing that bit :sexface:

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I cba

I haven't even learnt it all, not gonna bother :frown:

Instead I did some M2, S2, S3+ :lol:

Reply 510

BP_Tranquility

Original post by L'Evil Fish

Thanks a lot

I dont understand bridging circuits at all

I saw this video a while ago which helped me understand it - it might help you as well :wink:

http://m.youtube.com/watch?v=EzA3Jw8_8K8

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Reply 511

Knowing

Original post by L'Evil Fish

Thanks a lot

I dont understand bridging circuits at all

ImageUploadedByStudent Room1371501894.554815.jpg

My attempt at drawing the bridge rectifying circuit :tongue:

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Reply 512

ryanb97

Original post by L'Evil Fish

I cba

I haven't even learnt it all, not gonna bother :frown:

Instead I did some M2, S2, S3+ :lol:

Are u gna revise over the summer
Im gna go and tty to finish :c3,c4 fp1 and m2

U think that a m1 type of Q will come up tomorrow....i havent teally seen a decent one in any book tbh

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