If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long time, the phenomenon is termed as which of the following?

If the absorption of electromagnetic radiation by matter results in t

1.	If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long time, the phenomenon is termed as which of the following?
A.	Luminescence
B.	Fluorescence
C.	Phosphorescence
D.	Spontaneous emission
Answer» D. Spontaneous emission

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