Energy of a photon is calculated using the formula
$ E_p$ = ( Plancks constant x speed of light / wavelength)
$ E_p$ = ( 6.634 x $10^ -34$ J .s x 3 x $10 ^8$ m$s^-1$ ) / 13.2 x $10^-9$ m
$ E_p$ = ( 6.634 x $10^ -34$ J .s m $s^-1$ / 13.2 x $10^-9$ m
$ E_p$ = ( 19.902 x $10^ -26$ J .s m $s^-1$) / 13.2 x $10^-9$ m
$ E_p$ = ( 19.902 x $10^ -26$ J .s m $s^-1$) / 13.2 x $10^-9$ m
= 1.507 x $10^-15$ J