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Home
All Subjects
CSS
CSS MPT
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CSS Past Papers
Past Papers
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Departmental Past Papers
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Subject:
Physics
When we excite some atoms by heat collision or electrical discharge they will________________?
A.
radiate electromagnetic energy with a continuous distribution of wavelength
B.
absorb particular wavelengths when white light is incident on them
C.
radiate electromagnetic energy of discrete characteristic wavelength
D.
emit either invisible or visible light
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