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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 short time, the phenomenon is termed as which of the following?(a) Luminescence(b) Fluorescence(c) Phosphorescence(d) Spontaneous emissionI got this question in an online interview.This question is from X-Ray Fluorescence Spectrometry in portion X-Ray Spectrometers of Analytical Instrumentation

Answer»

The correct choice is (b) Fluorescence

Explanation: If the ABSORPTION of electromagnetic radiation by matter results in the EMISSION of radiation of the same or longer wavelengths for a short TIME, the phenomenon is TERMED as fluorescence. Fluorescence emissions are characteristic of the PARTICULAR element.



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