The value and units of the Planck constant 'h' can be expressed as:
Correct answer: C. 6.63 x 10^-34 Js
- A. 3.63 x 10^-34 Js
- B. 6.63 x 10^-34 Js-1
- C. 6.63 x 10^-34 Js
- D. 6.63 x 10^-43 Js
Explanation
Planck's Constant tells us the relationship between energy and frequency of light.The Planck constant, denoted by 'h', is a fundamental constant in quantum mechanics. Its value and units are as follows:Value of the Planck constant (h):h = 6.62607015 × 10-34 joule-secondsSince 'energy' is denoted by Joules (J) and 'frequency', by '1/hz or sec'; Planck's constant has the units, Js.
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Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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