In normal state of energy the incident high energy photons will be______________?
Correct answer: B. Absorbed
- A. Stimulated
- B. Absorbed
- C. Cause X-ray emission
- D. Cause laser production
Explanation
In the normal energy state, most atoms are in the lower level, so an incident photon with the correct energy is absorbed to raise an atom to a higher level. The likely wrong choice is stimulated, which requires an atom already in the upper state and leads to emission rather than absorption.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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