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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Dawn of Modern Physics
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.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Dawn of Modern Physics questions
In order to produce pair production the minimum energy of photon required is:
In the Compton Scattering experiment the X-ray wavelength change Δλ is _. Here h is Planck constant, m rest mass of electron and θ is angle after scattering.
When an observer moves with velocity of light, relative to a timing device at rest, he would notice:
An electron moving with velocity v has momentum 3 x 10 -26 Kg.m/s. The de Broglie wavelength associated with it is _. Value of h = 6.63 x 10^-34 is.
If the time interval between the occurrence of two events is measured in a frame with no relative motion in which two events occur. Then the time measured by the observer in a frame moving with relative velocity v is _.
The charge of a photon is: