The weight of an electron is:
Correct answer: C. 9.108 × 10−31 g
- A. 9.108 × 10−30g
- B. 9.108 × 10−25 g
- C. 9.108 × 10−31 g
- D. Too less to be measured
Explanation
9.108 × 10-30 g: This option represents the approximate weight of an electron. It is in the range of the actual mass of an electron, which is approximately 9.109 × 10-30 kg.
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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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