Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

How is the angular momentum value (mvr=h/2 pi) in Bohrs atomic theory (postulates) calculated? Please explain it in an easy way.

What exactly do you want to know? How the formula was derived? Or its applications?



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

Actually, angular momentum value (mvr=nh/2 pi) not h/2pi.Coming to the point, Firstly, this formula was not derived by anyone. It was observed by BOHR from an experiment. Later it was proved by Albert Einstein with the help of De Broglie Equation. According to de Broglie,

Wavelength(w) = h/mv       ---(I)

and from equation derived after de Broglie eqn:-

nw = 2 pi r       ---------------(II)

where n is number of wave, w is de Broglie wavelength, r is radius of shell.From equation I and II,

n(h/mv) = 2 pi r         (putting the value of w from eqn I to II)

After simplifying we get,

Angular Momentum = mvr = nh/2 pi


1 5 1
Absolutely correct!! Well done(y)
thanks tanishq
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts