Hi, What books would be good to read if i want to understand: How light works: Is there a good physics book that gives you a good intuition for how light works and how it's used in modern application. I'm really curious about the light duality view (particle wave) and want to understand everything about how light works. So where do i start? What books are good? How Heat works: I wan't to understand what heat is, how it relates to light, and how it's used in modern applications. Do we really know what heat is? what books would be good to read to get a clear understanding of what heat is (perhaps with demonstrative experimens)?