PHI 102 Lecture Notes - Lecture 21: Qualia, Paul Churchland, Electromagnetic Spectrum
12 Sep 2016
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Visible: able to be seen; capable of being seen, exposed to view. Most objects are not visible in and of themselves. Their vision is derivative: extrinsically visible, they need light to be visible. But light is visible in and of itself: intrinsically visible, it doesn"t need light to be visible. Luminance: the property possessed by light of having intrinsic or original visibility. A quality directly accessible from the visual pov. Light is electromagnetic (em) radiation, and visible light for humans is a small segment of the. L-physicalism" is the theory that light is physical (em radiation) 1: there is an epistemic gap between light and physics, meaning argument: (searle) If l-physicalism is true, then light is a physical process. If l-physicalism is true, then light supervenes on the physical. 1: we can conceive of inverted, absent, and partial luminance, what is conceivable is possible. 4: therefore, l-physicalism is false (or is only possibly true)
