From the course: Exploring Photography: White Balance and Color Temperature
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Understanding white balance and black-body radiation - Photoshop Tutorial
From the course: Exploring Photography: White Balance and Color Temperature
Understanding white balance and black-body radiation
- If you've spent much time reading about the more technical aspects of photography, especially the more technical aspects of white balance, you may have come across the term, "black-body radiation". Black-body radiation is just a model that physicists use for describing the color of light, and it's a pretty simply concept. If you take a black body, a black thing. And I mean a sturdy, black thing, something that's got some substance to it, it needs that cause we're gonna heat it. If you take a black body and you start heating it, it's gonna change color. As it heats up, it's gonna go from black into reddish-orange, and then yellow, and if you heat it up it's gonna start turning blue, and if you heat it even more it's gonna turn white, "White-hot", as we say. That's black-body radiation. As I heat to a particular temperature, the black body radiates a certain color of light. Therefore, we measure the color of a light in terms of temperature. We speak of color temperature, and the scale…
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