Tagged Questions
2
votes
1answer
119 views
Find temperature of surface (Blackbody Radiation)
An astronomer is trying to estimate the surface temperature of a star with a radius of $5 \times 10^8\ m$ by modeling it as an ideal blackbody. The astronomer has measured the intensity of ...
0
votes
1answer
99 views
Calculating the amount of heat energy radiated by sun
How do I calaculate the amount of heat energy radiated from the sun in one minute?? Well, i tried some stefan method, but the answer seems far off from the correct one....well, i would thus strongly ...
2
votes
2answers
243 views
Are Newton's law of Cooling and Stefan's law related?
Many of Indian school textbooks claim a proof of Newton's law of cooling from Stefan's law of black-body radiation.
As far as I am aware of, Newton's law is based on cooling from convection currents ...
1
vote
1answer
292 views
Calculate temperature of the earth through blackbody radiation
I don't understand the solutions to a problem about blackbody radiation and was wondering if anybody could help me out.
Here is the question:
The sun can be considered as a blackbody radiation ...
0
votes
1answer
164 views
Mathematical derivation of $N(\lambda)d\lambda$
We all know that in Rayleigh-Jeans law,
$$N(f)df ~=~ 8\pi f^2 df/c^3.$$
How do you derive $N(\lambda)d\lambda$?
I am sort of confused...
-1
votes
1answer
216 views
Black body balloon in vacuum [closed]
The problem statement, all variables and given/known data
There is a perfectly spherical balloon with surface painted black. It is placed in a perfect vacuum. It is gently inflated with an ideal ...
1
vote
1answer
135 views
2d or 1d conduction in this scenario?
There is a rectangular fin attached to a heat exchanger with a base temperature of 350K. The fin has uniform properties and experiencesa uniform heat generation. It also experiences heat transfer with ...
