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If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long or a short time, the phenomenon is termed as which of the following?(a) Luminescence(b) Fluorescence(c) Phosphorescence(d) Spontaneous emissionThis question was addressed to me by my school principal while I was bunking the class.This is a very interesting question from X-Ray Fluorescence Spectrometry in portion X-Ray Spectrometers of Analytical Instrumentation

Answer»

The correct choice is (a) LUMINESCENCE

The EXPLANATION: If the absorption of electromagnetic radiation by matter results in the EMISSION of radiation of the same or LONGER wavelengths for a short or a long time, the phenomenon is termed as luminescence. Usually, absorption of electromagnetic radiation results in the emission of radiation.



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