Diffuse reflection in 5 minutes

Equivalent to a 50 minute university lecture on diffuse and mixed reflection.
0:00 - intro
0:10 - paper under a microscope
0:45 - diffuse reflection
1:32 - Lambertian reflection formula
2:19 - color: what makes an apple red?
2:39 - visible light spectrum
2:59 - photon: energy particle with a particular wavelength
3:11 - wavelength-dependent reflection
3:31 - three-component color reflection
4:19 - combining diffuse and specular reflection
4:57 - non diffuse/specular materials
Graphics in 5 minutes is a series of cartoon-style videos that teach computer graphics in 10x less time. You can take the equivalent of a University level computer graphics course in just over two hours. The playlist is here:
• Graphics in 5 minutes ...
See here for more information: g5m.cs.washington.edu/

[@mohamedkas3239]

thank you for the explication , im here mainly to understand why the apple have that white spot how come she reflect all colors specularly at that point ,im a begginer in physics i didnt understand the formulas... but i uderstand that you based your explanation on the wax on it . but you can notice the same phenomenon without the wax , for example a tomato shine the same way without being coverd with wax , if you know why this happens can you explain it to me or explain it in a video id be much greatful for that . and wish for you best

[@g5min]

Right, it doesn't have to be wax -- the skin itself could be shiny and reflect some of the light specularly. The light that's reflected off of the surface doesn't penetrate far enough to hit the pigments, which absorb the shorter (non-red) wavelengths.

[@mohamedkas3239]

@@g5min thank you , you helped me to clear things out