The dimensions of the Planck constant are;
Correct answer: B. [ML2T-1]
- A. [MLT-2]
- B. [ML2T-1]
- C. [MLT-3]
- D. [ML2T-2]
Explanation
Using the SI units for energy (J) and frequency (Hz), the equation is written as:[h] = [E] / [f][h] = [J] / [Hz] Since 1Hz is equivalent to 1/s, the dimensions can be written as:[h] = [J] / [s][h] = [ML²T-2] / [T][h] = [ML²T-1]
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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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