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Physically based rendering from first principles
In this interactive article, we will explore the physical phenomena that create light and the fundamental laws governing its interaction with matter. We will learn how our human eyes capture light and how our brains interpret it as visual information.
Some insects, like bees, can see ultraviolet light, which helps them locate flowers by revealing hidden patterns and markings created by specialized pigments, such as flavonoids, that reflect UV wavelengths. On the other end of the spectrum, gamma rays are highly energetic and can be dangerous, they are generated by radioactive decay, nuclear bombs, and space phenomena like supernovas. We can characterize the incoming light by describing the amount of energy it carries at each wavelength using a function called the Spectral Power Distribution or SPD for short.
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