Moon, Parry and Domina Eberle Spencer (4 results)

Condition: Very Good. 1981 reprint. White paper covers with black cover titles and spine titles; no wear on covers; 8vo, 7 3/4 - 9 3/4" tall; no jacket; previous owner's name on front cover and flyleaf; faded stamp on flyleaf; rest of interior is clean and unmarked. 322 pages.

Hardcover. Condition: UsedGood. Hardcover; The Van Nostrand Series in Electronics and Communications; surplus library copy with the usual stampings; reference number written on spine; fading and shelf wear to exterior; corners bumped; top corner of paper inside back cover folded under; in good condition with clean text and tight binding. No dust jacket.

Condition: Sehr gut. VII, (5), 257, (1) Seiten. Mit zahlreichen Graphen und schematischen Abbildungen im Text. Umschlag an Ecken und Kapital leicht berieben, Kopfschnitt leicht angestaubt und Besitzeintrag mit Bleistift auf dem Vorsatz, sonst sehr gutes und sauberes Exemplar der gesuchten Arbeit. - Very good copy with signature of the previous owner to pastedwon. - "The subject of photometrics, the measurement of radiation and the calculation of amounts of radiant power, is treated by an application of the methods of field theory to concepts in geometrical optics. The basic concepts of pharosage, pharos and helios are introduced, and relations between them are examined. Reflectance holors and pharosage vectors are considered, and the solution of radiation problems by means of field methods, involving primarily the quasi-potential is discussed. Contour integration based in Stoke's theorem is presented as an alternative method of calculating the photic field, and the possibilities of the vector potential in the radiation field are considered. Determinations of the total pharos between two surfaces by the use of the McAllister-sphere, field-mapping and contour-integration methods are examined, as well as calculations for two-dimensional fields. Attention is also given to weighting functions used for various receptors, and to a phenomenological specification of polarization." ISBN: 0262131668 Sprache: Englisch Gewicht in Gramm: 1001 Gr. 8° (23,5 x 15,5 cm). Orig.-Leinenband mit Titelprägung auf dem Rücken sowie Orig.-Schutzumschlag. [Hardcover / fest gebunden].

Hardcover. Condition: UsedGood. Hardcover; fading, light spotting, and shelf wear to exterior; bumps to the upper corners; otherwise in good condition with clean text and tight binding.