Physics Unit 2 IAL

Yeah i linked it with its total internal reflection. I wrote something on critical angle and said that most light is reflected backwards due to which it gives sparkling effect.

What did u write about principle of superposition?
They repeated this question and i actually learnt it lol
It was *When 2 or more waves collide they go under superposition (1mark)
The total diaplacement at point is the sum of all the displacements* (1mark and displacement was underlined)
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Yeaah same here! just wrote the same thing, but crap, i wrote the photoelectric equ wrong, to find the frequency! got resistance wrong 2 mcqs and diamondd question

Reply 81

AvWOW

3

Original post by hiddensecrets

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It was from glasss/diamond to air.
Total internal reflection,I dreww an angle of 28 degrees to the normal reflecting inside diamond.

Are you sure you gave IAl paper and not GCE..anyways im not sure if I'm right, maybe yours is.So calm down hopefully we both get an A :biggrin:

How can I not know if I'm doing GCE or IAL? :P I did IAL xD haha yeah... Really hope for an A

Reply 82

AvWOW

3

Original post by usmanzubair

Yeah i linked it with its total internal reflection. I wrote something on critical angle and said that most light is reflected backwards due to which it gives sparkling effect.

What did u write about principle of superposition?
They repeated this question and i actually learnt it lol
It was *When 2 or more waves collide they go under superposition (1mark)
The total diaplacement at point is the sum of all the displacements* (1mark and displacement was underlined)
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Yeah me too. I wrote the critical angle is smaller for diamond so more light is internally refracted..
And yes, same thing for superposition.
What abou the explanation for why there are quiet and loud sounds?
.

Reply 83

hiddensecrets

2

I mean cause u wer really sure abt the angle being from air to diamond...and that aint true..so i was like maybe u did Gce and u ddnt know xD

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Reply 84

hiddensecrets

2

Check out the previous posts ...the answers are given
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(edited 8 years ago)

Reply 85

LovelyLivvi

The angles were from glass and diamond both to air. I also got 44.8 which I rounded to 45degrees for glass to air. And for diamond total internal reflection occurs.

Reply 86

hiddensecrets

2

What do you think will be an A grade ? :/

(edited 8 years ago)

Reply 87

usmanzubair

3

Original post by hiddensecrets

What do you think will be an A grade ? :/

50 maybe

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Reply 88

Rulezz

2

Original post by hiddensecrets

Check out the previous posts ...the answers are given
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Link??

Reply 89

MadZler

2

Original post by usmanzubair

That last 6 markers for glass and diamond were easy.
But what threw me off was that polarising effect :/ i might just get 1 or 2 lol
And about speakers i described all cons dest when the waves collide and all. But i forgot to link it to the question lol at the end i had 3 limes left only ao i wrote there. I really really hope they dont ignore what i wrote :frown:

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I was kinda lucky because our teacher showed us the polarising filters so I remembered the explanation quite well. Essentially in photo 1 they are filtering the same planes so there's a decrease in intensity whereas the 2nd you get filtering in horizontal and vertical planes, so no light transmits.

Original post by Rulezz

Why is data logger more efficient??
I wrote it gathers data automatically and produce graphs is that correct??
And for diamond question last one I wrote diamond has a high refractive index and therefore more total internal reflection for diamond

I said because it can take readings more often so you get a smoother more accurate line graph.

Reply 90

hiddensecrets

2

Original post by Rulezz

Link??

In the speaker thing, the path diff between x and y from L1 is equal to the wavelength (I dont remember the value though,you subtract the x and y ) .since the path diff is equal to the wavelength both the waves are in phase.Constructive in Interference takes place and so louder sound is heard.At Q1 path diff is half the wavelength.They are antiphase and so destructive interference takes place
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(edited 8 years ago)

Reply 91

userxx990

2

when will arsey post the ms?