physics cosmology Watch

This discussion is closed.
Nemesis420
Badges: 0
#1
Report Thread starter 14 years ago
#1
does any one have any cosmology notes as i really need some help, thanks
0
misty
Badges: 2
Rep:
?
#2
Report 14 years ago
#2
ditto that! hehehe- nowhere has any- i seaarched forever!!
0
Nemesis420
Badges: 0
#3
Report Thread starter 14 years ago
#3
it look like i have to start reading the book again, that book is sooo boring and confusing specially the names of the scientist. So many to remember anyway thanks
0
misty
Badges: 2
Rep:
?
#4
Report 14 years ago
#4
just bumping this as im desperate!
0
john !!
Badges: 14
Rep:
?
#5
Report 14 years ago
#5
Ask some questions... I don't have cosmology notes (and I'm not going to type up what I know about it)... but I might be able to help you, as well as lots of other people.
0
Fluffstar
Badges: 0
Rep:
?
#6
Report 14 years ago
#6
I wrote myself a list of the equations/laws/derivations a while back - its by NO MEANS comprehensive (i.e. - please read the book too! i don't wanna be blamed for being wrong!) and there's probably a few little errors on there - but if its of any help to you guys...

(its handwritten so I apologise for my handwriting! )

If you have the OCR skinny book (blue, cool pic of moon on it) theres great summary sections at the end of each chapter that are brill for revision; if ya dont wanna read the whole thing (i dunno what was up with the guy who wrote it - the text puts me to sleep!)

I can't upload it because its too big (870kB .pdf), but email me f l o w e r 5 6 7 {at} hot-mail /dot com (just to stp spammers) and ill send it to you as an attachment.

Hope this helps...
0
misty
Badges: 2
Rep:
?
#7
Report 14 years ago
#7
aww thanks- ive just found a site- http://www.danyey.co.uk/cos_i.html
so if i get stuck ill come an ask- thanks a million x
0
misty
Badges: 2
Rep:
?
#8
Report 14 years ago
#8
(Original post by Fluffstar)
I wrote myself a list of the equations/laws/derivations a while back - its by NO MEANS comprehensive (i.e. - please read the book too! i don't wanna be blamed for being wrong!) and there's probably a few little errors on there - but if its of any help to you guys...

(its handwritten so I apologise for my handwriting! )

If you have the OCR skinny book (blue, cool pic of moon on it) theres great summary sections at the end of each chapter that are brill for revision; if ya dont wanna read the whole thing (i dunno what was up with the guy who wrote it - the text puts me to sleep!)

I can't upload it because its too big (870kB .pdf), but email me f l o w e r 5 6 7 {at} hot-mail /dot com (just to stp spammers) and ill send it to you as an attachment.

Hope this helps...
cheers dude ill email ya
0
Fluffstar
Badges: 0
Rep:
?
#9
Report 14 years ago
#9
(Original post by mik1a)
Ask some questions... I don't have cosmology notes (and I'm not going to type up what I know about it)... but I might be able to help you, as well as lots of other people.
yeah, um, how come the sun can be classified as a black body? :confused:
0
misty
Badges: 2
Rep:
?
#10
Report 14 years ago
#10
(Original post by misty)
cheers dude ill email ya
actually never mind- thanks for the offer tho- my inbox is too full heh
0
Fluffstar
Badges: 0
Rep:
?
#11
Report 14 years ago
#11
OK just found textbook it says "a black body absorbs all radiation that falls on it" - but surely the sun reflects some energy? or am I just being thick? :rolleyes:
0
john !!
Badges: 14
Rep:
?
#12
Report 14 years ago
#12
It absorbs all the radiation it gets, like a piece of coal. The sun doesn't appear black because it emits tonnes of energy as well (literally, tonnes... I worked this out in AS physics, something like 10^20 kg s^-1 mass are being converted to energy)
0
Fluffstar
Badges: 0
Rep:
?
#13
Report 14 years ago
#13
(Original post by mik1a)
It absorbs all the radiation it gets, like a piece of coal. The sun doesn't appear black because it emits tonnes of energy as well (literally, tonnes... I worked this out in AS physics, something like 10^20 kg s^-1 mass are being converted to energy)
Cheers - makes a little more sense! and you can use Wein's displacement thingy to work out its temperature right?
0
Nylex
Badges: 10
Rep:
?
#14
Report 14 years ago
#14
(Original post by Fluffstar)
and you can use Wein's displacement thingy to work out its temperature right?
If you know λmax, yeah.
0
misty
Badges: 2
Rep:
?
#15
Report 14 years ago
#15
(Original post by Fluffstar)
Cheers - makes a little more sense! and you can use Wein's displacement thingy to work out its temperature right?

"Wein's displacement thingy"

Is that in the syllabus? ive never heard of it- eeeeek :eek:
0
john !!
Badges: 14
Rep:
?
#16
Report 14 years ago
#16
(Original post by misty)
"Wein's displacement thingy"

Is that in the syllabus? ive never heard of it- eeeeek :eek:
Wein's law... the most intense wavelength emitted by the star is inversely proportional to the surfact temperature of the star:

lambda max * surface temperature = something like 2.898*10^-3 m K^-1
0
misty
Badges: 2
Rep:
?
#17
Report 14 years ago
#17
right- thanks- ill go look gi tup- cheers xx
0
Nemesis420
Badges: 0
#18
Report Thread starter 14 years ago
#18
can some one tell me how to do time dilation experiment as i always get stuck on that question. what diagram should i show.
0
Rose in Bloom
Badges: 0
Rep:
?
#19
Report 14 years ago
#19
Nemesis420 what do you mean by time dilation....plz expalin cuz it sounds foriegn to me (you doing edexcel right?)
as for cosmology, check out this like its gr8!- it has links to other stuff!
http://www.asa2physics.co.uk/pages/U...sed_universes/
0
Nemesis420
Badges: 0
#20
Report Thread starter 14 years ago
#20
noo i dont think u have to know this stuff, it so hard to learn this. it about Einstein theories.
0
X
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
  • Sheffield Hallam University
    City and Collegiate Campus Undergraduate
    Sun, 3 Feb '19

Brexit: Given the chance now, would you vote leave or remain?

Remain (111)
79.86%
Leave (28)
20.14%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise