New PDF release: Building Physics: Lighting. Seeing in the Artificial

By W. R. Stevens

ISBN-10: 0080063705

ISBN-13: 9780080063706

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By W. R. Stevens

ISBN-10: 0080063705

ISBN-13: 9780080063706

Show description

Read or Download Building Physics: Lighting. Seeing in the Artificial Environment PDF

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Additional resources for Building Physics: Lighting. Seeing in the Artificial Environment

Example text

E. Saunders, Scales of apparent brightness, Trans. Ilium. Eng. Soc. ), 31, 122 (1966). H. C. WESTON, Relation between illumination and visual performance. Medical Res. Council. Industrial Health Res. Board Report N o . O. Reprint (1953). H. C. WESTON, Trans. Ilium. Eng. Soc. ), 26 (1961). W. S. STILES and C. DUNBAR. Ilium. Res. ) Tech. Paper No. O. L. L. HOLLADAY, / . Opt. Soc. Amer. 14, 1 (1927). P. PETHERBRIDGE and R. G. Trans. Ilium. Eng. Soc. Technical Report No. 10. See also P. R. BOYCE, The influence of illumination level on prolonged work per­ formance y Ltg Res and Technology 2, 74 (1970).

FZ2 4r2 The illuminance is independent of the position of Y and Z. Thus, total illuminance at Z due to reflected light alone is proportional to Lda taken over the whole surface. Assuming the paint has a uniform reflectance the luminance of the sphere wall is propor­ tional only to the bare lamp flux and the sphere area: and this argument may be applied not only to the first but also the second, third and subsequent reflections. L. C 56 BUILDING PHYSICS: LIGHTING Now, if E is the illuminance due to reflected light, the total flux falling on the sphere by diffuse reflection must be 4π r2E.

Padgham and J. E. Saunders, Scales of apparent brightness, Trans. Ilium. Eng. Soc. ), 31, 122 (1966). H. C. WESTON, Relation between illumination and visual performance. Medical Res. Council. Industrial Health Res. Board Report N o . O. Reprint (1953). H. C. WESTON, Trans. Ilium. Eng. Soc. ), 26 (1961). W. S. STILES and C. DUNBAR. Ilium. Res. ) Tech. Paper No. O. L. L. HOLLADAY, / . Opt. Soc. Amer. 14, 1 (1927). P. PETHERBRIDGE and R. G. Trans. Ilium. Eng. Soc. Technical Report No. 10. See also P.

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Building Physics: Lighting. Seeing in the Artificial Environment by W. R. Stevens


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