Calculate the wavelength of the photon emitted when an electron in a hydrogen atom…

PHYSICS · Single correct · CBSE · Physics · Atoms · Atoms

Problem

Calculate the wavelength of the photon emitted when an electron in a hydrogen atom drops from the

n=4

state to the

n=2

state. Constants:

E_n=-13.6\,\text{eV}/n^2

h=6.63\times10^{-34}\,\text{J\,s}

c=3.00\times10^{8}\,\text{m/s}

1\,\text{eV}=1.60\times10^{-19}\,\text{J}

. (a)

9.75\times10^{1}\,\text{nm}

(b)

3.66\times10^{2}\,\text{nm}

(c)

4.88\times10^{2}\,\text{nm}

(d)

9.74\times10^{2}\,\text{nm}