Q. 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?

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Q. 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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Q. 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?

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Q. Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena?

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Q. The measurement of intensity of fluorescent X-rays provide a simple and ____________ way of _____________ analysis.

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Q. The energy of the emitted X-rays depends upon the _________ of the atom and their intensity depends upon the __________

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Q. Which of the following is Mosely’s equation if ‘C’ is the speed of light, ‘a’ is proportionality constant, ‘σ’ is a constant which depends on electronic transition series, ‘Z’ is the atomic number and ‘λ’ is the wavelength?

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Q. The problem of spectral interference is not severe in X-ray spectroscopy.

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Q. In X-ray fluorescence spectrometer, the relationship between the excitation intensity and the intensity of fluorescence does not depend on which of the following?

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Q. Fluorescent X-ray spectrometers would require only moderate-intensity X-ray tubes.

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Q. Which of the following components of the X-ray fluorescent spectrometer induces fluorescent radiation?

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Q. Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?

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Q. Which of the following does not make the X-ray tube nearly monochromatic?

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Q. Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?

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Q. Energy dispersive system uses which of the following detectors?

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Q. In Energy dispersive system, the energy level and the number of pulses is related to which of the following?

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Q. The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.

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Q. The crystal used as X-ray grating has _______ dimensional lattice arrays.

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Q. Which of the following can be done to avoid loss of intensities of X-rays due to the absorption of long wavelength X-rays?

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Q. In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.

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