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I'm confused. If reflecting 90% of infrared radiation only produces a luminous efficiency of 6.6%, how can any further increase in reflection lead to 40% effici
by PhasmaFelis 10y ago
I'm confused. If reflecting 90% of infrared radiation only produces a luminous efficiency of 6.6%, how can any further increase in reflection lead to 40% efficiency?
- Eliezer 10y agoObvious but maybe wrong answer: because it's not linear, if you trap nearly all the IR it stays until converted to visible, otherwise it still escapes after a couple of bounces.
- pranjalv123 10y agoIf you reflected all the infrared light, the efficiency would be 100%, since all the light leaving the bulb would be visible. Normally, the vast majority of the light leaving the bulb is infrared, but if you keep 90% of it in the bulb, then 6.6% of the light leaving the bulb is visible light.