NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
September 21, 2018, 04:11:46 am *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 
   Home   Help Search Login Register  
"Make priority, take action and start now." ...Wisdom
Google Bookmarks Yahoo My Web MSN Live Netscape Del.icio.us FURL Stumble Upon Delirious Ask FaceBook

Pages: [1]   Go Down
  Print  
Author Topic: Bohr's Theory of the Hydrogen Atom  (Read 10932 times)
0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
on: April 17, 2010, 08:20:47 am » posted from:Uberaba,Minas Gerais,Brazil

This applet Bohr's Theory of the Hydrogen Atom by Prof Hwang
Original Bohr's Theory of the Hydrogen Atom

Embed a running copy of this simulation

Embed a running copy link(show simulation in a popuped window)
Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!


* bohr's.jpg (35.45 KB, 608x562 - viewed 487 times.)
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #1 on: April 17, 2010, 08:49:55 am » posted from:Uberaba,Minas Gerais,Brazil

In atomic physics, the Bohr model, devised by Niels Bohr, depicts the atom as a small, positively charged nucleus surrounded by electrons  that travel in circular orbits around the nucleus—similar in structure to the solar system, but with electrostatic forces  providing attraction, rather than gravity. This was an improvement on the earlier cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911). Since the Bohr model is a quantum physics-based modification of the Rutherford model, many sources combine the two, referring to the Rutherford–Bohr model.
 http://en.wikipedia.org/wiki/Bohr_model
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #2 on: April 17, 2010, 08:53:51 am » posted from:Uberaba,Minas Gerais,Brazil

Introduced by Niels Bohr in 1913, the model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.


* 310px-Bohr-atom-PAR.svg.png (19.26 KB, 310x270 - viewed 3774 times.)
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #3 on: April 19, 2010, 06:53:11 pm » posted from:,,Brazil

n 1913, the Danish physicist Niels Bohr (1885 - 1962) managed to explain the spectrum of atomic hydrogen by an extension of Rutherford's description of the atom. In that model, the negatively charged electrons revolve about the positively charged atomic nucleus because of the attractive electrostatic force according to Coulomb's law.

But the electron can be taken not only as a particle, but also as a de Broglie wave (wave of matter) which interferes with itself. The orbit is only stable, if it meets the condition for a standing wave: The circumference must be an integer multiple of the wavelength. The consequence is that only special values of radius and energy are allowed. The mathematical appendix explains how to calculate these values.

According to classical electrodynamics, a charge, which is subject to centripetal acceleration on a circular orbit, should continuously radiate electromagnetic waves. Thus, because of the loss of energy, the electron should spiral into the nucleus very soon. By contast, an electron in Bohr's model emits no energy, as long as its energy has one of the above-mentioned values. However, an electron which is not in the lowest energy level (n = 1), can make a spontaneous change to a lower state and thereby emit the energy difference in the form of a photon (particle of light). By calculating the wavelengths of the corresponding electromagnetic waves, one will get the same results as by measuring the lines of the hydrogen spectrum.

You must not take the idea of electrons, orbiting around the atomic nucleus, for reality. Bohr's model of the hydrogen atom was only an intermediate step on the way to a precise theory of the atomic structure, which was made possible by quantum mechanics and quantum electrodynamics.
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #4 on: April 19, 2010, 06:57:18 pm » posted from:,,Brazil

Bohr's images


* Índice1.jpeg (2.81 KB, 97x94 - viewed 864 times.)

* Índice2.jpeg (4.5 KB, 156x88 - viewed 386 times.)

* Índice3.jpeg (1.7 KB, 88x94 - viewed 856 times.)

* Índice4.jpeg (6.66 KB, 162x196 - viewed 620 times.)

* Índice5.jpeg (2.08 KB, 94x94 - viewed 906 times.)

* Índice6.jpeg (2.8 KB, 92x94 - viewed 875 times.)

* Índice.jpeg (4.5 KB, 156x88 - viewed 406 times.)
Logged
tesla2
Jr. Member
**
Offline Offline

Posts: 56


«
Embed this message
Reply #5 on: November 15, 2014, 09:43:54 am » posted from:Warsaw,Mazowieckie,Poland

Sir in 2014 I proved that Exist very strong force inside atom

I LOVE MR MACH  ...

HOW HEAVY IS MASS M  left / right  ?

Moon ---->V1
i
i
R distance
i
i
Earth 

Moon = Earth's  Satellite  / radial force  Fr = M*V1*V1 /R

m
T
O
W  (r) distance
E
R
Earth




MAROSZ ( me )

  EACH MASS m = Earth's satellite. Mass m feel the same force what Moon !

  Fr = m*V2*V2 /r. What will be if ? high tower =  short table.




Please speed up Moon = Moon will escape to more high obrbite 

 Please speed up mass m what will hapen Huh

ONLY !  on Planet and inside real  gravitation m can start fly !!! 





Physics is very nice and mistery please repeat my experiment with light 
http://maroszphysics.blogspot.com/

Logged
Pages: [1]   Go Up
  Print  
"Make priority, take action and start now." ...Wisdom
 
Jump to:  


Related Topics
Subject Started by Replies Views Last post
looking for a pn theory of cdma technology
Electromagnetics
PANKAJ 2 18550 Last post December 31, 2014, 06:43:15 pm
by faarisuman
Atomic Spectra of Hydrogen and red shift « 1 2 »
Modern Physics
Fu-Kwun Hwang 32 44558 Last post December 14, 2014, 05:24:07 pm
by diinxcom
Bohr's Theory of the Hydrogen Atom
Request for physics Simulations
chatria 1 10646 Last post November 19, 2008, 05:40:14 pm
by Fu-Kwun Hwang
Bohr's Theory of the Hydrogen Atom
Modern Physics
Fu-Kwun Hwang 3 21627 Last post January 21, 2010, 03:23:10 pm
by dreweverett
Atomic Spectra of Hydrogen and red shift
modern physics
ahmedelshfie 0 3395 Last post May 15, 2010, 12:38:12 am
by ahmedelshfie
Powered by MySQL Powered by PHP Powered by SMF 1.1.13 | SMF © 2006-2011, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.056 seconds with 24 queries.since 2011/06/15