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Using Bohr's postulates obtain the e...

Using Bohr's postulates obtain the expression for Bohr radius .

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Give the expression for Bohr magneton.

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Using Bohr.s postulates, derive the expression for the frequency of radiation emitted when electron in hydrogen atom undergoes transition from higher energy state (quantum number n_1 ) to the lower state ( n_f ). When electron in hydrogen atom jumps from energy state n_1 = 4 to n_f = 3, 2, 1, indentify the spectral series to which the emission lines belong.

Writer Bohr's postulates for the hydrogen atom model.

Show that the electron revolving around the nucleus in a radius 'r with orbital speed 'r' has magnetic moment evr/2. Hence, using Bohr's postulate of the quantization of angular momentum, obtain the expression for the magnetic moment of hydrogen atom in its ground state.