HORTICULTURE

Detailed explanation-1: -1. To express the relationship between the number of molecules reacting with the number of photons absorbed, the concept of was introduced. Explanation: The concept of quantum efficiency was introduced to express the relationship between a number of molecules reacting with the number of photons absorbed.

Detailed explanation-2: -Explanation: Stark-Einstein law is also known as the Principle of Quantum Activation. It states that in a primary photochemical process, only one molecule is activated for every photo of light absorbed by the chemical system.

Detailed explanation-3: -The quantum efficiency of a solar cell is defined as the ratio of the number of electrons in the external circuit produced by an incident photon of a given wavelength. Thus, one can define external and internal quantum efficiencies (denoted by EQE() and IQE(), respectively).