Question

Wave number of a spectral line for a given transition is x 1/cm for He+, then its value for Be3+ for the same transition is-
(a) x 1/cm
(b) 4x 1/cm
(c) x/4 1/cm
(d)2x 1/cm

Answer 1

Wavenumber ∝ Z²

x/y = (2/4)²
x/y = 1/4
y = 4x 1/cm

Correct option is (b)

Answer 2

Answer is (b) 4x 1/cm

Solution is enclosed.