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Color Absorption:
Absorption by each of the three processes follows an exponential law. The absorption coefficient for each process depends on the energy of the gamma radiation and the atomic number of the absorber. In each of the three absorption processes energetic electrons are produced ; hence detection of gamma radiation resolves itself into the detection of these secondary electrons.Another way to characterize a radioisotope is by the nature of the radiations. Because of the great differences in the way alpha, beta, and gamma radiations are absorbed in matter, absorption properties are very useful for characterization. Since absorption of the different radiations is also a function of energy, absorption curves have been used widely to determine energies and thus to identify species. As noted above, both gas counters and scintillation counters can operated to give pulses proportional to energies of the radiation absorbed. Sevi ferent types of pulse-sorting equipment whi be used to determine energies and intensil radiations have been developed. These n developed instruments give much more and precise information than absorption.
Color absorption of light. Wall colors have a definite effect on the amount of wattage required in a room. Light colors, in general, give a greater percentage of reflections and get the most out of the light used. Dark-colored walls and fabrics soak up light. The following Table shows colors when they are illuminated by white light. Relative percentages may be estimated for other colors. The surfaces are assumed to be in a dull finish giving a diffused reflection. Highly polished surfaces slightly increase the percentage of reflection. Surfaces reflect the color of their own hues.
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