Word: light
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Dates: during 1930-1939
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...page report throws brilliant light on many a dark corner of the youth problem. Youth's biggest worries are neatly summed up by one youngster thus: "The problem is how to get married on $15 a week." Some hard facts...
From Berlin last week came news that technicians of Siemens & Halske Co. had developed a ''super-microscope" with a magnifying power far surpassing that of ordinary high-grade instruments. To obtain its supermagnification, the German instrument uses beams of electrons instead of waves of light...
...modern physics, beams of light are considered as particles as well as waves, and beams of electrons are considered as waves as well as particles. A microscope using visible illumination is limited in magnifying power by the wave length of light. Particles considerably smaller than the wave length escape detection because they slip through the meshes of the light waves like BB shot through a tennis net. But electrons have wave lengths 100,000 times smaller than those of light, and electrons, although they cannot be focused by a lens, can be focused by electric or magnetic fields which...
Electrons make impressions on photographic emulsions just as light particles do. Using a magnification factor of 20,400, the Siemens & Halske scientists obtained pictures of the pus germ, Staphylococcus aureus, as big as pennies. In photographs with ordinary high-power microscopes, such germs show up pinhead-size...
There are three major ways of harnessing sunlight directly; mechanical (concentrating the rays with parabolic reflectors); electrical (using photoelectric cells to convert light energy into electricity); chemical (imitating the natural photosynthesis of plants). Since plants themselves store solar energy, there is also the possibility of using plants themselves for fuel-e.g., powdered cornstalks instead of powdered coal. Last year sun-minded Mr. Cabot gave Harvard $615,773 for a long-range research program to increase the rate at which plants store solar energy (TIME, June...