The Bohr's postulate for stationary orbits of Hydrogen atoms _. Here m is the mass of the electron, v velocity, r orbital, and h is Planck's constant.
Correct answer: B. mvr=nh/2ℼ
- A. mr=nhv/2ℼ
- B. mvr=nh/2ℼ
- C. mvr=nh/2ℼr
- D. mv=nhr/2ℼ
Explanation
Bohr's postulate regarding stationary orbits states that the angular momentum (L) of an electron is quantized and can be expressed as L = mvr = nh/2π, where n is a positive integer. This means that the electron can only occupy certain orbits where its angular momentum is an integral multiple of h/2π.The correct option, Option B, accurately represents this quantization with mvr = nh/2π.Option A, C, and D incorrectly represent the formula with additional terms or incorrect arrangements, not aligning with the quantization condition as described by Bohr.
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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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