Question

Which of the following term defines the production of heat and light when excited molecule returns to its original state?

(a) Fluorescence

(b) Luminescence

(c) Intersystem crossing

(d) Phosphorescence

I have been asked this question in an online interview.

I'd like to ask this question from Photosynthesis in chapter Bioenergetics and Metabolism of Life Sciences

Answer 1

Correct option is (a) Fluorescence

Explanation: When extra energy converted to heat and light it is called fluorescence while luminescence is the term given to radioactive decay. Intersystem crossing is the conversion of an excited singlet state to the excited triplet state. In phosphorescence light emitted by triplet to ground state transition.