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ganeshie8
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in 3D, why theta = l/r^2. in 2D theta = l/r. im not good with noneuclidean geometries.. can somebody pls show a proof or give a good link pls
 2 years ago
 2 years ago
ganeshie8 Group Title
in 3D, why theta = l/r^2. in 2D theta = l/r. im not good with noneuclidean geometries.. can somebody pls show a proof or give a good link pls
 2 years ago
 2 years ago

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experimentX Group TitleBest ResponseYou've already chosen the best response.1
due to the nature of conservation of flux
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
its related to 1/r^2 relationship ?
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
yeah i believe everything that propagates in 3D follows that
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
if universe were flat ... the law of gravity would be F = Gm1m2/r instead of r^2 < at least that's how i'm thinking these days
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
yes i get that.. im looking for a proof. i got stuck while refreshing electrostatics when i come across flux around point charge
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
i think Gauss law is fine ...
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
gauss law is next topic .... ill see if it gets addressed .. thank you :)
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
there maynot be any derivation. its just a fact this 1/r^2 relation for 3D model
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
this is very easy to visualize ... in terms of light. the intensity of light decreases by /r^2 ... because light diverges in all 3d directions. dw:1344027074813:dw
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
dw:1344027132708:dw the total light must be same in both surface.
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
let's say ... this is due to the geometry of the sphere (surface) in 3D ... and the conservation of theorem.
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
*conservation law
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
i see that... total light has to escape throuh both the spherical surfaces. its same light that goes out
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
yep ... or i must be stupid.
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
this is a law is it.. we cannot derive 1/r^2 relationship... like we derive 1/r in circle for theta
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
everything seems new.. now when i open my books again
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
what do you mean by 1/r in circle ... can you elaborate a bit?
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
my suggestion ... never open a book :D
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
il get back... read some more. actually im looking for some derivation of relation between angle and area for a sphere
 2 years ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
you need solid angle
 2 years ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.0
yeah looks like we need to consider surface area of sphere... i think im getting it now.. il try... thank you :D
 2 years ago
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