Question $7,$ chap $141,$ sect $4.$ part $1$ of $3,10$ points

A photon emitted as a hydrogen atom undergoes a transition from the $n=8$ state to the $n=2$ state.

Find the energy of the emitted photon. Answer in units of eV $.$

Question $8,$ chap $141,$ sect $4.$

part $2$ of $3,10$ points

Find the wavelength of the emitted photon. Answer in units of nm$.$

Question $9,$ chap $141,$ sect $4.$

part $3$ of $3,10$ points

Find the frequency of the emitted photon.

Answer in units of Hz $.$