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(i)what is wawelength of Hb line in balmer series of H spectrum

(ii)When e are de exciting from nth orbit to ground level of H atom of 15 spectral lines are formed during shortest wawelength among them is
(iii)The radii of 2 of first 4 orbits of H atom are in ratio 1:4,the energy diference may be



The Brainliest Answer!
Use formula of rz^2*i/n^2-!/n^2
2 5 2
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