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If Bohar 's quantisationpostulate( angularmomentum = nh//2pi) is a basic law of nature , it should be equalbe equallyvalid forthe caseof planetarymotionalso . Whythen dowe never speak of quatisation of orbitof planets around the Sun ? |
| Answer» SOLUTION :If we tryto applyBohr.s quantum conditionsto PLANETARY motion then on calculatingangularmomentum OFPLANET we find the VALUEOF angularmomentum is incomparably large relativeto Planck.s constant h. For earth , it issuchthat quantum numbern `=10^(70)` .For such large values ofn,the difference in thesuccessive energies and angularmomenta of thequantised levels of theBohr modelare sosmall that of all purposewe may considerthe angularmomentum aswellas ENERGY levels continuous. | |