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Bryn Mawr College Monographs Volume 12; Reprint Series (Paperback) Loot Price: R449 Discovery Miles 4 490
Bryn Mawr College Monographs Volume 12; Reprint Series (Paperback): Bryn Mawr College
Bryn Mawr College Monographs Volume 12; Reprint Series (Paperback): Bryn Mawr College

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Bryn Mawr College Monographs Volume 12; Reprint Series (Paperback)

Bryn Mawr College

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Loot Price R449 Discovery Miles 4 490

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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. 1922 Excerpt: ...same groups, of wave-lengths made equal in energy at three lower intensities: 1/2 A, 1/4 A and 1/12 A. Spectra 1/2 A, 1/4 A and 1/12 A were obtained from A by the use of the sectored disc with a proper ratio of open to TABLE II Showing the change in the selectiveness of the achromatic response of the eye to wave-length produced by varying the intensity of light. In this table are shown in per cent of the original value the photometric values of each of the colored lights when their energy values have been reduced respectively to 1/2, 1/4, and 1/12 of the values present in equal energy Spectrum A. The changes in the deviations of the relative photometric from the relative radiometric values produced by the changes of intensity may be noted by comparing the percentages in Column 2 with 50 per cent; in Column 3 with 25 per cent; and in Column 4 with 8.33 per cent. Chart I Showing the change in the relative selectiveness of the achromatic response of the eye to wave-length produced by varying the intensity of the light. In this chart is represented the photometric value in meter-candles of wave-lengths selected from eight different parts of equal energy spectra sustaining to each other the following ratios of intensity: A, Vz A, Vn, A, and 1/12 A. closed sector inserted between the collimator lens and the prism of the spectroscope. The photometric-radiometric comparison was made with the apparatus and by the method already described. A graphic representation of these results is given in Chart I. In order to show the changes in the selectiveness of the achromatic response to wave-length produced by changing the intensity of light, Table II has been prepared. In the several columns of this table are shown in per cent, of the original value the photometric values ...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: May 2012
First published: May 2012
Authors: Bryn Mawr College
Dimensions: 246 x 189 x 6mm (L x W x T)
Format: Paperback - Trade
Pages: 110
ISBN-13: 978-1-231-28043-0
Barcode: 9781231280430
Categories: Promotions
Books > Humanities > History
Books > Humanities > History > General
Books > History > General
LSN: 1-231-28043-3

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