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Fluorescence occurs when samples of some materials are exposed to rays of which EMR region?
Q7: A simple magnifying glass has a focal
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Q24: How many times greater is the speed
Q29: Electric charge is measured in units of<br>A)
Q42: The image of a convex mirror is
Q42: In both the Bohr model and the
Q66: The intensity of a 80-dB whistle is
Q73: Compounds formed when the atoms involved share
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