The value of Planck's constant 'h' can be expressed as? The value of plank's constant 'h' can be expressed as?t 'h' can be expressed as?
Correct answer: B. 6.63 x 10^-34 Js
- A. 6.63 x 10^-34 Js-1
- B. 6.63 x 10^-34 Js
- C. 6.63 x 10^-42 Js
- D. 3.63 x 10^-34 Js
Explanation
Option B is correct.The value of Planck's constant 'h' can be expressed in different units. The most common units are joules per second (J s) and electronvolts per hertz (eV Hz-1). The value of Planck's constant in joules second is: h = 6.63 × 10−34 J.s The value of Planck's constant in electronvolts per hertz is: h = 4.13566766 × 10^−15 eV Hz Planck's constant is a fundamental physical constant that is related to the energy of photons. It is a very small number, but it is important in many areas of physics, including quantum mechanics and black hole physics.
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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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