1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: The reflected Radiance

  1. Apr 5, 2009 #1
    Imagine that the mean solar irradiance reaching the earth falls on a high altitude, low-latitude fresh snow field that acts as a perfect lambertian reflector. It has albedo of 100% with radiance being reflected isotropically into the upward hemisphere. Assume that you can completely ignore atmospheric effects, that the snow field is horizontal and that the solar zenith angle is 0. What would the reflected radiance be?

    ** What i have tried is:

    I know how to find the solar irradiance and also i have the formula for finding the reflected radiance but there is this thing called the BRDF (bidirectional reflectance distribution function) which i am not totally sure about. i tried using:

    L(p, ωr ) = f(p, ωi , ωr ) E(p, ωi )
    = f(p, ωi , ωr ) L(p, ωi ) cosΘi dωi

    where The BRDF is f(p, ωi , ωr ) and the other function is the irradiance.

    Dont know where to go from here to find the Reflected radiance.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted