What is the wavenumber of the radiation emitted when a hydrogen
atom makes a transition corresponding to a change in energy of
1.634 x 10-18 j?

Wavenumber of the radiation emitted  is

Explanation:

The relationship between wavelength and energy of the wave follows the equation:

where,

E = energy of the radiation =

h = Planck's constant  =

c = speed of light =

= wavelength of radiation = ?

Putting values in above equation, we get:

Thus wavenumber of the radiation emitted  is

the temperature of the gas, in k, not celsius.