From 7f795e1810a92ff1e5e86d91f06aec526745a329 Mon Sep 17 00:00:00 2001 From: Tyler Perkins Date: Thu, 10 Nov 2022 20:15:01 -0500 Subject: [PATCH] Update for 10-11-22 20:15 --- tech/light_transport.wiki | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/tech/light_transport.wiki b/tech/light_transport.wiki index 91212b4..8c16ce8 100644 --- a/tech/light_transport.wiki +++ b/tech/light_transport.wiki @@ -6,8 +6,29 @@ What is radiant flux? * total amount of energy passing through a surface (measured per second) * Radiant flux in Watts or Joules/second -Why do we not use radiant flux? +=== Why do we not use radiant flux? === * When we emasure a high flux val, we dont know if lots of energy through a small surface, or a little energy through a huge surface * TLDR its to ambiguous + +New unit irradiance +* Flux per unit area +* IE Watt/m^2 + +=== Why do we not use irradiance? === + +We know the surface, but we still need an angle +* Could be lost of energy in a huge angle +* little energy in a small angle + +New unit Radiance +* Flux per unit area angle +* W / (m^2 * radians) + +== Basic question == + +How do we calculate how much light exits a surface point in a given direction + +[[maxwell_equations|Maxwell equations]]! +