Where Do Quantum Gravity and Cosomology Fit in Physics?

[Peter25samaha]

In which branch of physics we can put Quantum Gravity and Cosmology ?
-astrophysics ?
-relativity ?
-quantum mechanics ?
-classical mechanics?
Or other ?

 

[Vanadium 50]

What is this obsession with categorization? And why do you think two different subjects are necessarily in the same branch?

 

[Peter25samaha]

What is this obsession with categorization? And why do you think two different subjects are necessarily in the same branch?

i know that those 2 subjects are not in the same branch but i want to leanr more about quantum gravity and more about cosmology (those are 2 different subjects) and first i have to determine those 2 in which branch they are

 

[Nugatory]

first i have to determine those 2 in which branch they are

Why?

 

[Peter25samaha]

Why?

i have some branches i want to do i want to know Cosmology and Quantum gravity in which one they are (i mean each one .. in which branch)

 

[berkeman]

So when you go to wikipedia and look up each of those subjects individually, what do you find? Surely you can do your categorization exercise on your own using wikipedia...

 

[secur]

I think OP simply means which Physics Forum to use when posting questions about Quantum Gravity - particularly relating to Cosmology? Could be "Quantum Physics" or "Special and General Relativity" or "Cosmology". I'd try the latter and see what happens, if nothing, try the others.

 

[berkeman]

if nothing, try the others.

Multiple/cross-posting is against the PF rules. If a member wants their thread moved, they need to click on the Report link in their post, and ask the Mentors to move the thread.

 

[secur]

If a member wants their thread moved, they need to click on the Report link in their post, and ask the Mentors to move the thread.

- that's what I meant. But since he may not have read the PF rules, thanks for clarifying

 

[Peter25samaha]

I think OP simply means which Physics Forum to use when posting questions about Quantum Gravity - particularly relating to Cosmology? Could be "Quantum Physics" or "Special and General Relativity" or "Cosmology". I'd try the latter
and see what happens, if nothing, try the others.

No i don't mean that . I mean in which branch we study cosmology and quantum gravity

 

[Vanadium 50]

I think this is where I came in.

 

[Nugatory]

No i don't mean that . I mean in which branch we study cosmology and quantum gravity

If you want to study quantum gravity or cosmology... Then you study quantum gravity or cosmology. You will not be in a position to study either topic until have a solid grounding in all the foundational areas of physics: quantum mechanics, special and general relativity, classical mechanics, statistical mechanics. Thus, it's silly to ask which "branch" you need - you need them all.

 

[Peter25samaha]

If you want to study quantum gravity or cosmology... Then you study quantum gravity or cosmology. You will not be in a position to study either topic until have a solid grounding in all the foundational areas of physics: quantum
mechanics, special and general relativity, classical mechanics, statistical mechanics. Thus, it's silly to ask which "branch" you need - you need them all.

Yeh i think this is good i need all of them . But electricity , i think that i don't need it in all of that quantum physics ,gravity , darke energy and matter , black holes . Should i learn electricity branch in these things ?

 

[Nugatory]

Yeh i think this is good i need all of them . But electricity , i think that i don't need it in all of that quantum physics ,gravity , darke energy and matter , black holes . Should i learn electricity branch in these things ?

You absolutely need electricity and magnetism - it is an essential part of basic physics. Until you have learned the elementary stuff, which is to say everything that will be covered in a serious undergraduate program plus a year or so of additional study, you will not even be able to read a paper on, for example, quantum gravity.

 

[secur]

A course on English Composition wouldn't hurt either

 

[Zafa Pi]

A course on English Composition wouldn't hurt either

What is the branch of English Composition?

 

[secur]

Teaches how to express your thoughts clearly using the English language

 

[Peter25samaha]

Teaches how to express your thoughts clearly using the English language

English is my third language its for that

 

[ZapperZ]

Why do some people think that they can do a 100 meter sprint when they haven't even learned how to crawl?

This question should be clear in ANY level of English.

Zz.

 

[secur]

English is my third language its for that

- Translation web sites, like Google translate, are useful. When needing to post in another language, first I translate my English to that language; then, translate it back. Change garbled phrases, try again. When it comes back making sense I figure it's good to go. With a little practice you learn how to phrase things simply; and, reading the translation helps me pick up the other language.

- Also, mention you're not proficient in English, everybody will cut you some slack.

Why do some people think that they can do a 100 meter sprint when they haven't even learned how to crawl?

- Because they're young and foolish. Later on, you're still foolish, but at least you no longer want to do a 100 meter sprint

[EDIT] of course I'm using the generic "you": i.e. "one is still foolish". Just in case there's any misunderstanding