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70 views

Photometric versus radiometric and spectral quantities

Are spectral quantities the same as photometric quantities? How do you pass from a radiometric quantity $R$ to the correspondent spectral quantity $R_λ$ I've been ask to pass from Irradiance to ...
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264 views

Implementing a black-body using Planck's Law in a 3D ray tracer

1_ In one of my software projects, I need to implement Planck's Law in terms of wavelength. I can't be sure if it's right because I've seen different variations of it, and all the implementations ...