NEET Physics Nuclei Questions Solved


The ionisation potential of H-atom is . When it is excited from ground state by monochromatic radiations of 970.6 A0, the number of emission lines will be (according to Bohr’s theory) 
(a) 10            (b) 8
(c) 6              (d) 4

(c) 1λ=R1n12-1n22

1970.6×10-10=1.097×107112-1n22n2=4

 Number of emission lines  N=n(n-1)2=4×32=6

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