According to Heisenberg's uncertainty principle, which of the following option isCORRECT for the position and momentum of a particle?
Correct answer: A. The more precisely the position is determined, the less precisely the momentum is known.
- A. The more precisely the position is determined, the less precisely the momentum is known.
- B. The position and momentum of a particle can both be precisely determined simultaneously.
- C. The uncertainty in position and momentum are independent of each other.
- D. The uncertainty in position has no effect on the uncertainty in energy.
Explanation
The correct answer is that the more precisely the position of a particle is known, the less precisely its momentum can be known, and vice versa. This is the essence of the Heisenberg Uncertainty Principle. Option A captures this relationship accurately. Option B is incorrect because it contradicts the principle by suggesting precise determination of both position and momentum. Option C is incorrect as it suggests no relationship between the uncertainties, which is false. Option D is incorrect because it addresses energy instead of momentum, which is not relevant to the question.
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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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