1. An information processing device, provided with a power generating element for converting light into power, for performing processing responsive to an environment in which a wavelength of illuminating light changes, comprising: a plurality of power generating elements whose power generating efficiencies differ with respect to light having different predetermined wavelengths, respectively; a plurality of voltage detecting sections for detecting voltages of power generated by the plurality of power generating elements, respectively; a determining section for determining any of the plurality of power generating elements, whose power generating efficiency is different relative to the others on the basis of the respective detected voltages of the plurality of power generating elements, to determine a surrounding environment on the basis of a determination result; and a processing section for performing processing responsive to the determined surrounding environment.