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Shai

energy of refracted/reflected rays

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Here you see a light ray (1) entering a specular sphere. Part of ray 1 is reflected and becomes ray 2a. Another part is refracted and becomes ray 2b. Now my question is how much energy of ray 1 is used in rays 2a and 2b. Basically I can't decide which one of these two theories is correct: - theory 1: the energy of ray 1 is used for rays 2a and 2b in accordance with the Fresnel equation. - theory 2: the energy of ray 1 is attenuated according to the dot product of ray 1 and the normal of the point where ray 1 hits the sphere. The remaining energy is then used for rays 2a and 2b in accordance with the Fresnel equation.

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Quote:
Original post by Shai
- theory 2: the energy of ray 1 is attenuated according to the dot product of ray 1 and the normal of the point where ray 1 hits the sphere.

"Attenuated" into what? Conservation of energy still applies here, and if this is a glass sphere then it's certainly not being absorbed as heat. Your first theory is correct.

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