The biological effects of a given dose of electromagnetic energy generally become more serious as the energy of the radiation increases: Infrared radiation has a pleasant warming effect; ultraviolet radiation causes tanning and burning; and X rays can cause considerable tissue damage. What energies in kilojoules per mole are associated with the following wavelengths:

a) infared radiation with y= 1.44*10^-6m

b) ultraviolet with y= 233 nm

c) xrays with y=5.34 nm