- #1
Ryo124
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Homework Statement
A standard candle has radiant intensity equal to 1/683 W/sr.
[The unit of measurement is watts per steradian. The steradian (sr) is the standard unit for solid angles: If a patch on the surface of a sphere of radius r has area A, then the solid angle subtended by the patch at the center of the sphere is A/r^2. The solid angle of an entire sphere is 4π because the area is 4πr^2.]
a) What is the energy flux density (power per unit area) at a distance of 1.06 meters from the candle?
b)What is the candle power of a 75 watt light bulb?
Homework Equations
I figured out the power to be 1.84E-2 W
The Attempt at a Solution
I'm not sure how to solve this one.