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210. The incident luminous flux, Φ, is divided into three components: the reflected luminous flux, Φr; absorbed luminous flux, Φa and transmitted luminous flux, Φt. Choose the correct formula:A Φ = Φr + Φa + ΦtB Φ = Φr - Φa + ΦtC Φ = Φr + Φa - ΦtC Φ = Φr • Φa • ΦtE Neither formula is correct.
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