Wavelength and frequency are inversely related. Radiation can also be described as Energy. Photons have a set amount of energy - the energy is quantized. As frequency increases so does energy. Radiation with high energy has a high frequency.
High frequency means short wavelength.
Visible light makes up only a tiny portion of all of the electromagnetic spectrum. Refer to Figure 2.2 in your text and be able to reference the other types of radiation relative to visible light with respect to energy, frequency and wavelength. Matter interacts with energy. The energy captured can be used to drive chemical reactions. Higher energy radiation can impose more change into matter than can lower energy radiation.