Sentences with phrase «as neutral densities»

Not exact matches

If you put a rectangular neutral - density filter, such as dark glasses, on a sheet of white paper, the filter allows only a certain proportion of light through — say, 50 percent.

The instruments measure atmospheric densities and temperatures for both the electrically neutral (e.g., carbon dioxide, CO2, atomic oxygen, O, atomic hydrogen, H, and other species) and the electrically charged constituents (that is, ions such as CO2 + and O2 +, and electrons).

The «green energy» problem is twofold: 1, develop «carbon - neutral» or renewable energy sources (capture sunlight); 2, convert the energy to a useful form such as high - density liquid fuel.