Question

The quantum yield of photosynthesis is measured in terms of

• A. The number of oxygen molecules evolved.
• B. The number of oxygen molecules evolved per quantum of light absorbed.
• C. The number of oxygen molecules evolved per water molecules broken.
• D. The number of oxygen molecules evolved per carbon dioxide molecule fixed.

Answer 1

The correct option is B

The number of oxygen molecules evolved per quantum of light absorbed.

In a chemical photodegradation process, when a molecule dissociates after absorbing a quantum of light, the quantum yield is the number of destroyed molecules divided by the number of photons absorbed by the system.