Ratio of velocity of electron revolving in 2nd orbit of hydrogen atom to that of 1st orbit of hydrogen atom is ‘X’. Ratio of radius of 1st orbit to 2nd orbit of hydrogen atom is ‘Y’. The value of XY is
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Ratio of velocity of electron revolving in 2nd orbit of hydrogen atom to that of 1st orbit of hydrogen atom is ‘X’. Ratio of radius of 1st orbit to 2nd orbit of hydrogen atom is ‘Y’. The value of XY is