| What is the difference between unit: h and unit : ħ =h/ 2pi? -
07-20-2006, 10:13 AM
1. Many years M. Planck was attracted with the absolutely black body problem. If quantum of light moving with speed c=1 falls in area of absolutely black body and does not radiate back, then “ terminal dead “ comes. In 1900 Planck decided: to save the quantum of light from death is possible that quantum of light will radiate with unit h=Et. Physicists say, that Planck,s unit is one: h=1. Having this unit h=1 quantum of light flies with speed c=1. 2. In 1925 Goudsmit and Uhlenbeck decided that Electron has its own unit : ħ =h /2p. Unit : ħ = h/ 2pshows that electron has own angular momentum ( own inner impulse). Thanks to its own inner impulse electron rotates around its diameter. 3. These units do not come from any formulas or equation. Planck, Goudsmit , Uhlenbeck and Bohr introduced These units in the physics intuitively. 4. These units work, so they are recognized. |