- #1
Saitama
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Homework Statement
The intensity produced by a long cylindrical light source at a small distance r from the source is proportional to
a)[itex]\frac{1}{r^2}[/itex]
b)[itex]\frac{1}{r^3}[/itex]
c)[itex]\frac{1}{r}[/itex]
d)None of these
Homework Equations
I=[itex]\frac{dF}{dω}[/itex]
I is the intensity, dF is the luminous flux of the radiation emitted by the source in a small cone of solid angle dω constructed around the given direction.
The Attempt at a Solution
I have absolutely no idea on where to begin with. I know this would involve integration but i am clueless on how to form the integral. Any help is appreciated!