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from article Delta electrons
Nuclear emulsion showing iron nucleus (Z = 26) in cosmic radiation entering from upper right and producing large numbers of delta electrons, giving its track a heavy, “hairy” appearance.
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from article Couple
Vector properties of a couple.
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from article Couple
Equivalent couples.
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from article Illumination
Spectral response of human eye to radiation. (After W. B. Boast, Illumination Engineering, 2d ed., McGraw-Hill, 1953)
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from article Illumination
Ideal reflection. (a) Specular, such as from a polished surface. (b) Diffuse, such as from a that surface of microscopic roughness. (After W. B. Boast, Illumination Engineering, 2d ed., McGraw-Hill, 1953)
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from article Illumination
Typical reflection characteristics. (a) Practical mat surface. (b) Semimat surface. (c) Semimat surface at large angle of incidence. (d) Porcelain-enameled steel. Broken-line curves in a and d illustrate ideal cosine distribution. (After W. B.…
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from article Illumination
Spatial characteristics of ideal transmission media. (a) Specular. (b) Diffuse. (After W. B. Boast, Illumination Engineering, 2d ed., McGraw-Hill, 1953)
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from article Illumination
Transmission characteristics. (a) Solid opal glass. (b) Flashed opal glass. (c) Sand-blasted glass. (d) Sand-blasted glass, incident light at 30° from plane at surface. (After W. B. Boast, Illumination Engineering, 2d ed., McGraw-Hill, 1953)
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from article Illumination
Process of evaluating the luminous exitance of a reflecting surface after evaluating the illumination. (a) Spectral irradiation Gλcurve. (b) Spectral luminous efficiency vλ curve. (c) Curve of vλGλ. Illumination is the area under this curve, the…
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from article Electromagnetic pulse (EMP)
The explosion from the Climax test shot of Operation Upshot-Knothole, conducted in June 1953 at the Nevada Test Site. (Credit: National Nuclear Security Administration/Nevada Site Office/DOE)
