In the following atoms and molecules for the transition from n = 2. to n = 1, the spectral line of minimum wavelength will be produced by

Q: In the following atoms and molecules for the transition from n = 2. to n = 1, the spectral line of minimum wavelength will be produced by

(a) Hydrogen atom

(b) Deuterium atom

(c) Uni-ionized helium

(d) di-ionized lithium

Ans: (d)