HWK43s_G11(1) - only that color’s frequency(Each pigment...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
HWK 43 (11th grade) (SOLUTIONS) (due 5/18/07) Read chp. 27 (pages 404-405, 408-411) Read chp. 28 (pgs: 421-431) Do Chp. 27: 7, 8 Do Chp. 28: 6 (a and b), 7, 14 27.7: The color spectrum is a subset of the electromagnetic spectrum. It is the set of visible frequencies, ranging from red (lowest visible frequency) to violet (highest visible frequency). 27.8: Infrared (IR) frequencies are lower than visible frequencies which are lower than ultraviolet (UV) frequencies. 28.6 (a and b): A red transparent object transmits red light. It absorbs all other colors. 28.7: A pigment’s function is to selectively absorb light of certain frequen- cies while reflecting others. By combining diFerent pigments, artists can create a desired color by mixing pigments that together, reflect
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: only that color’s frequency. (Each pigment would reflect this desired frequency, while collectively, absorbing all others. This is what we call mixing colors by subtraction.) 28.14: Continuing the discussion begun in the above problem (7), we mix pigments to form a paint. The first pigment reflects the desired fre-quency (or color, or hue), but it also reflects other unwanted colors. So we mix in further pigments whose real functions are to absorb the un-wanted colors while still reflecting the desired color. This is why we call it ”mixing by subtraction”. We get what we want by subtracting what we don’t want from the first pigment. 1...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online