Q.No.124: - What is meant by fluorescent? On which factor it depends?

Q.No.124: - What is meant by fluorescent? On which factor it depends?

Ans: - Objects in which the emission of light ceases immediately (within 10^-8s) after the source of the excitation is removed are called fluorescent. It depends upon the duration of light emission after the source of excitation is removed. The example is fluorescent lamp.