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: Leslie Cube

  1. Jan 23, 2005 #1
    A Leslie cube has a surface temp of 97C. One of its four side faces has an area of 100 cm^2 and is painted black. Calculate:

    a) the wavelength at which the spectral intensity (per unit wavelength) is a maximum

    b)the total intensity (all wavelengths) of the emitted radiation just outside the surface

    C) the total power emitted by the black surface

    for a) i used lambda=2.9*10^-3/T (not sure if this is the correct way of doing it)

    for b) i wanted to use Stefan's Law but this seems to simple

    for c) i multiplied the answer from b) by the area of the four sides.

    does any of this sound correct? i seem to be struggling on this topic

    also, in Planck's energy density equation, what exactly is the spectral energy density? is it also known as anything else? thanks.
  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