Question

A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?

Answer 1

Answer:

99.18 micro-meter, lyman series

Explanation:

Given,

photon energy= 12.5 eV

We have to calculate the wavelength of emitted series.

so we will use the formula,

$E= hc/\lambda$

where,

h = planck's constant

c= speed of light

$\lambda=wavelenth$

hence,$\lambda=hc/E$

=> length of wavelength(micro-meter) = 1.2398/photon energy(in eV)

                                                                =1.2398/12.5 micro-meter

                                                                =99.18 micro-meter

The wavelength of this measurement will belong to lyman series.