Uncertainty principle can be expressed as:
Correct answer: C. Both (a) and (b)
- A. ΔpΔx = h
- B. ΔEΔI=h
- C. Both (a) and (b)
- D. None
Explanation
The Heisenberg uncertainty principle explains that momentum and position of a particle cannot be simultaneously at the same time with 100% accuracy. Similarly it is also impossible to measure the energy of a particle and the time measurement with 100% accuracy. ΔpΔx = h Is the expression for uncertainty in momentum and position of a particle. ΔEΔI=h Is the expression for uncertainty in energy and time measurement of a particle according to the Heisenberg uncertainty rule.
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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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