Hey all!! I am doing AS Physics for the WPH01/02/03 series and some of our spec points like these are required to be learnt. Does anyone have notes for this? Thanks!! 71 explain how wave and photon models have contributed to the understanding of the nature of light 2. explore how science is used by society to make decisions, for example, the viability of solar cells as a replacement for other energy sources, the uses of remote sensing