Photosynthetic enhancement with flashing light was first observed by

A. Benson and Calvin

B. Hill and Calvin

C. Hatch and Slack

D. Emerson and Arnold

Answer: Option D

Solution(By Examveda Team)

Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold.
Emerson and William Arnold found that "the yield per flash reached a maximum when just 1 out of 2500 chlorophylls absorbed a quantum".
Next, in 1939, Emerson demonstrated that between 8 and 12 quanta of light were needed to produce one molecule of oxygen. Thus, changes in flashing light lead to enhancement in the photosynthesis process.