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# Edexcel IAL Physics Unit 2 WPH02 May June 2016 Discussion

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What did you get for the mcq about the frequency of the refracted light?
The frequency stays the same during refraction so f, what did u put?

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2. (Original post by hamza02016)
I calculated the percentage uncertainity and the percentage difference.
I said that it is not a good method
I wrote that too
Did u calculated the plancks constant?
3. (Original post by mira99)
The frequency stays the same during refraction so f, what did u put?

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It was f
4. (Original post by mira99)
The frequency stays the same during refraction so f, what did u put?

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Yaaaas i wrote that too haha high five
5. (Original post by Bloom <3)
I wrote that too
Did u calculated the plancks constant?
Yesi did
6. (Original post by Blazyy)
I wrote it was, because I got a percentage difference of 0.99%
****. I got percsntage difference as 10. Something
7. After the plancks constant question I messed up and the last question I was just writing anything to fill the lines cause I didn't have time. Unit 1 was definitely better for me. I really hope the grade boundaries are low.
8. Dont we use v output = R / R + T x V input to find the thermistor?
9. (Original post by hamza02016)
Yesi did
What value did u get?
How did u calculated it?
10. What did you get for the internal resistance of solar cell and the efficiency?
11. There should be a poll here about the difficulty level of paper?
12. What was the ans for the last qs?
13. (Original post by Bloom <3)
What value did u get?
How did u calculated it?
E=HF
E=IVT
IVT=HF
IV x1/F = HF
H= [ IV (1/F) ] / F
E=HF
E=IVT
IVT=HF
IV x1/F = HF
H= [ IV (1/F) ] / F
I really messed it up then 😭
15. (Original post by Bloom <3)
What was the ans for the last qs?
I wrote electromagnetic waves have the same speed so when frequency increase the wavelength decrease and when wavelength increase frequency decrease to equate the speed. and so there will be atomic spectra line showing each wave and its wave length and frequency
16. Did anyone get 8000Hz for one of them????

Edexcel, thank you for eradicating any dreams of going to uni I had left after core 1.
I wrote electromagnetic waves have the same speed so when frequency increase the wavelength decrease and when wavelength increase frequency decrease to equate the speed. and so there will be atomic spectra line showing each wave and its wave length and frequency
Overall how many marks do u expect?
18. (Original post by TheBookWorm8531)
What did you get for the internal resistance of solar cell and the efficiency?
I did E= V + ir
E-V / I = r

efficiency = IV / flux times area i think or other way around, i put the small value numerator and big value denominator
19. (Original post by AlonsoAMG)
Did anyone get 8000Hz for one of them????

Edexcel, thank you for eradicating any dreams of going to uni I had left after core 1.
Include me too😞
I cant believe this is hapenning
20. (Original post by Bloom <3)
What was the ans for the last qs?
Hey there, last question was quite easy..you were supposed to say that the atoms of the element ( I think it was sodium ) get excited and move to higher energy levels, later, when they do return, they emit photons- only certain energy levels are possible... energy of the photon must equal the difference in the energy levels and as a result, there are only limited no. of energy differences corresponding to the set frequency and wavelength

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