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Phy 4 - Waves and Our Universe

2

hi budding physicsts, :wink:

i think its better we post all our phy 4 stuff here so that we can all read one thread instead of several.

neone in support? :tsr:

Reply 1

andyj72

OP

2

Can anyone explain spectra?

Reply 2

habosh

13

http://www.thestudentroom.co.uk/t91118.html :damnmate:

Reply 3

habosh

13

line spectra is coloured wavelengths on a dark bakground while absorbtion spectra is dark lines on a coloured background

Reply 4

andyj72

OP

2

habosh

line spectra is coloured wavelengths on a dark bakground while absorbtion spectra is dark lines on a coloured background

Ah, thats y i cud never understood it. so it means that there are 2 :-

1 line spectra
2 absorbtion spectra

damn phy 4 :frown:

. its doing my head in.

Cheers :thumbsup:

Reply 5

andyj72

OP

2

anyone get an "A" in phy4 in January?

Reply 6

habosh

13

you can say it's a series of discreat wavelengths :spectrum

Reply 7

andyj72

OP

2

habosh

you can say it's a series of discreat wavelengths :spectrum

which one => line or absorbtion.

im starting quantum physics in an hr or so, just finishing off waves

Reply 8

mackin boi

1

andyj72

anyone get an "A" in phy4 in January?

got 70/90 2 marks...i gt ma paper back and saw that all i needed was a little arrow and i wud have got an A!!!! :mad:

Reply 9

andyj72

OP

2

mackin boi

got 70/90 2 marks...i gt ma paper back and saw that all i needed was a little arrow and i wud have got an A!!!! :mad:

lol, unlucky. Ru retaking it?

Reply 10

nas7232

19

emission spectrum and absorption spectrum.

phy4 is easier than phy1 imo.

Reply 11

andyj72

OP

2

nas7232

emission spectrum and absorption spectrum.

phy4 is easier than phy1 imo.

ru kidding me?????? well it is easy revising it but the exam in jan was hard. it was for me. phy1 was easy for me cos it was mainly to do with motion and work/energy.

Reply 12

Economist

11

andyj72

anyone get an "A" in phy4 in January?

I scraped one 72/90 but im retaking because the exam really didnt go well. I was getting higher in the practice papers

Reply 13

shanepeters1

THIS IS REALLY EASY, I KNOW, But i cant seem to get the right answer, Can someone re arrange the formula which is used to find the time period for an oscillation on a spring to find the mass!!!!!! Thanks in advance

Reply 14

andyj72

OP

2

shanepeters1

THIS IS REALLY EASY, I KNOW, But i cant seem to get the right answer, Can someone re arrange the formula which is used to find the time period for an oscillation on a spring to find the mass!!!!!! Thanks in advance

sure, its T^2*k / 4п^2 = m

u rearrange the formula, easy things can seem hard at times

Reply 15

habosh

13

shanepeters1

THIS IS REALLY EASY, I KNOW, But i cant seem to get the right answer, Can someone re arrange the formula which is used to find the time period for an oscillation on a spring to find the mass!!!!!! Thanks in advance

(T^2 * K)/(4 π²)=m

Reply 16

andyj72

OP

2

Economist

I scraped one 72/90 but im retaking because the exam really didnt go well. I was getting higher in the practice papers

thats good, u should retake as uve got nothing to loose. dhow the examiners that their questions r easy peasy.

I got 72/90 in Phy 1`but i didnt bother to retake it cos i wanted to concentrate on the nxt modules. thinking about it now i should have. I didnt even think i will get an A in phy 1 cos it took me sometime to get my head round some simple stuff.