This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ... properly distributed light which contains certain wave-lengths in great excess may be ineffective because of the unusual or weak color effects produced thereby. For example, the light of an ordinary kerosene lamp is very deficient in the shorter wave-lengths; these shorter wave-lengths have much to do with the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ... properly distributed light which contains certain wave-lengths in great excess may be ineffective because of the unusual or weak color effects produced thereby. For example, the light of an ordinary kerosene lamp is very deficient in the shorter wave-lengths; these shorter wave-lengths have much to do with the bringing out of blue and violet tints, and consequently a deep blue or violet piece of cloth appears almost black by kerosene lamp light. False color values are produced in a very striking way by the light from the mercury-vapor lamp on account of the almost complete absence of longer wavelengths (red) in the light from this lamp. The brilliant white light of the carbon-arc lamp, on the other hand, contains all wave-lengths in about the same proportion as sun light, and all colors show up well by the light of such a lamp. Glare.--Excessive contrast of light and shade in the field of vision tends to hinder visual perception. The eye adapts itself automatically to the brightest lights in the field of view and all perception of detail in the shadows is lost. This blotting out of detail in the shadows by excessively brilliant lights in the field of vision is called glare and it is especially marked when the field of vision includes a bright unshaded lamp. The explanation of glare is as follows: In the first place, the pupil of the eye contracts greatly when there is a bright-light in the field of vision and this contraction lessens the effective brightness not only of The composition of light refers to the relative intensities of the various wavelengths which are present in the light. the "high lights" but also of the deep shadows; in the second place, the sensitiveness of the retina seems to be greatly reduced in bright light and although this...
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Add this copy of LIGHT AND SOUND: A Text-Book for Colleges and Technical to cart. $24.95, very good condition, Sold by Global Booksearch and Sales rated 5.0 out of 5 stars, ships from Amador City, CA, UNITED STATES, published 1910 by MacMillan Co..
Edition:
Believed to be a first, date printed on the title page
Publisher:
MacMillan Co.
Published:
1910
Language:
English
Alibris ID:
14173637335
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Seller's Description:
Very good. No dust jacket. This is a VG+++ text block, appears to be unused as the hinges are original and unbroken. Overall toning. Wear on outer items are basically from shelf wear. Bottom corners/edge worn through, head/heel worn as shown. Photo is specific to this listing. First edition. 344 p. HB w/o dj, 5 3/4 x 8 3/4", 17 Chapters, 3 Appendix Sections, Problems and Index. Filled w/drawings, graphs and photos. Becoming scarce. A fantastic graduation present for someone in this field. Classic text on light and sound from the perspective of the beginning of the 1900s.
