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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?

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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 emission

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This question is from X-Ray Fluorescence Spectrometry in portion X-Ray Spectrometers of Analytical Instrumentation

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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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