The distance between `4th` and `3rd` Bohr orbits of `He^(+)` is `:`

The distance between 4^(th) and 3^(rd) Bohr orbits of He^(+) is :

The distance between 3rd and 2nd bohr orbits of hydrogen atom:

Radius of 3rd Bohr orbit is

Radius of 3rd Bohr orbit is

The difference between the radii of 3^(rd) and 4^(th) orbits of Li^(2+) is Delta R_(1) . The difference between the radii of 3^rd and 4^(th) orbits of He^(+) is DeltaR_(2) . Ratio DeltaR_(1) : Delta R_(2) is :

The difference between the radii of 3^(rd) and 4^(th) orbits of Li^(2+) is Delta R_(1) . The difference between the radii of 3^rd and 4^(th) orbits of He^(+) is DeltaR_(2) . Ratio DeltaR_(1) : Delta R_(2) is :

The ratio of the radius difference between 4th and 3rd orbit of H-atom and that of Li^(2+) is:

The difference in energy between the 2nd & 3rd orbit of He^+ ion will be