Calculate the minimum frequency of a photon required to ionise a hydrogen atom in the…

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Calculate the minimum frequency of a photon required to ionise a hydrogen atom in the ground state. (Take

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

1\,\text{eV}=1.6\times10^{-19}\,\text{J}

and ionisation energy of hydrogen

=13.6\,\text{eV}

.) (a)

6.6\times10^{15}\,\text{Hz}

(b)

3.3\times10^{15}\,\text{Hz}

(c)

2.5\times10^{15}\,\text{Hz}

(d)

3.3\times10^{14}\,\text{Hz}