If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process: AB + hν - AB*, the rate of formation of AB* is directly ∝

Question

If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process: AB + hν -> AB*, the rate of formation of AB* is directly ∝

Prashant Kotian · Accepted Answer

Correct answer: B. According to Stark-Einstein's law of photochemical equivalence, each molecule absorbs one photon. Therefore, the rate of formation of the excited species AB* depends only on the number of photons absorbed per unit time, which is directly ∝ the intensity of absorbed light (I), and is independent of reactant concentration C.

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