Question

if an electron of hydrogen atom shift from 1 to 4. Calculate wavelength and wavenumber for this transition​

Answer 1

Answer:

Correct option is

B

Visible region

Let,

wave number =RH[(n1)21−(n2)21]

On substituting n1=2,n2=4,RH=109678 in equation,

wave number =109678×163

Also, λ=wavenumber1

or λ=406nm

Hence, visible region is the answer