If the radius of the 3rd Bohr's orbit of hydrogen atom is r3 and the radius of 4th Bohr's orbit is r4. Then :

Question

If the radius of the 3^rd Bohr's orbit of hydrogen atom is r₃ and the radius of 4^th Bohr's orbit is r₄. Then :

${r_4} = {9 \over {16}}{r_3}$

${r_4} = {16 \over {9}}{r_3}$

${r_4} = {3 \over {4}}{r_3}$

${r_4} = {4 \over {3}}{r_3}$

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