Question

The first action spectrum based on photosynthesis was given by ______

• A. Jan Ingenhousz
• B. Joseph Mathew
• C. Cornelius Van Neil
• D. T. W. Engelmann

Answer 1

Answer:

D. T. W. Engelmann

• T. W. Engelmann discovered the first action spectrum based on photosynthesis.

• He split light into its spectral components VIBGYOR by using a prism.

• A green alga i.e. Cladophora was used to detect the sites of O2 evolution.