The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 2005 |
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Page 69
... FIELD - EMISSION MICROSCOPE In this instrument a wire with a sharpened tip is mounted in a cathode - ray tube . Electrons are drawn from the tip by a high electrical field and travel toward the screen on which the image is formed . Only ...
... FIELD - EMISSION MICROSCOPE In this instrument a wire with a sharpened tip is mounted in a cathode - ray tube . Electrons are drawn from the tip by a high electrical field and travel toward the screen on which the image is formed . Only ...
Page 231
... field , the dipole moments tend to line up with the field . The effect augments the net magnetization in the direction of the applied field . Like diamagnetism , paramagnetism is weak and exists only in the presence of an applied field ...
... field , the dipole moments tend to line up with the field . The effect augments the net magnetization in the direction of the applied field . Like diamagnetism , paramagnetism is weak and exists only in the presence of an applied field ...
Page 232
... field and illustrates the ability of a material to retain its magneti- zation , even after an applied field is removed . Figure 103 illustrates this phenomenon in the form of a plot of mag- netization ( J ) versus applied field ( Hex ) ...
... field and illustrates the ability of a material to retain its magneti- zation , even after an applied field is removed . Figure 103 illustrates this phenomenon in the form of a plot of mag- netization ( J ) versus applied field ( Hex ) ...
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albite amphiboles ancient aragonite areas atoms basalt bivalves body calcite calcium called carbonate central centre century cephalopods chemical clay minerals colour common composition contain crust crystals ctenidia cult cultural deities deposits developed dolomite Earth economic eggs electron evaporite example existence facies feldspar Figure garnet gastropods goddess gods grains Hittite human igneous rocks important industrial kaolinite king known layers limestone magma magnetic major mantle cavity marine material mental metamorphic rocks metaphysics Mexican Mexico City mica Michelangelo microscope millimetres Milton mimicry mind Mineralogy modern Molière Mongolia Mongols Moscow myth nature object occur ocean olivine organic originally oxide percent period philosophers physical plagioclase political population pressure produced properties pyroxene quartz reaction region religion religious reprinted result sandstones sedimentary rocks sediments shell silicate smectite snails society species structure Sumerian surface temperature temple tetrahedrons texture tion typically United urban volcanic