What is spectrum?

What do you mean by electromagnetic spectrum?

Which physical quantity, if any, has the same value waves belonging to the different parts of the electromagnetic spectrum?

Define - Emission Spectrum. What are the classifications of spectrum?

What is the action spectrum of transpiration ?

What is pure and impure spectrum?

Differentiate between absorption spectrum and action spectrum.

Why is the spectrum of H^(+) not obtained?

The action spectrum of photosynthesis was discovered by

Distinguish between: (a) Absorption spectrum and action spectrum. (b) Cyclic photophosphorylation and Non cyclic photophosphorylation.