Hi all, got a bit of an experimental/theoretical confusion here. A group of us are doing an investigation into limiting the heating of solar panels while still allowing the majority of visible light to reach the panel cells. One theory we're intending to test out is using prisms to change the direction of the light around the visible range of the spectrum (directing it onto the solar panel) and hoping the infrared does not also get too absorbed by the prism and remains with its direction mostly unchanged. However, despite a fair bit of reading on the topic, there seems to be little information available about what happens if you pass infrared light through a glass prism. Does it just get absorbed? Or does it pass through? Another issue is that we require a rather large prism to be constructed (around 20cm dimensions), as they are prohibitively expensive, so the plan was to build one out of acrylic and fill it with water. Now obviously these two materials have different optical properties to glass, and different refractive indices, but would it still work as a prism? As long as it works to change the direction of visible light to some extend but not do the same to infrared is the idea. Thanks for any help!