The New Encyclopaedia Britannica, Volume 7Encyclopaedia Britannica, 1998 - Encyclopedias and dictionaries |
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Page 171
... light . The sides are left clear to admit the light from the pumping lamp , which may be a pulsed gas discharge , flashing on and off like a photographer's elec- tronic flash bulb . It may be wound around the laser rod , positioned ...
... light . The sides are left clear to admit the light from the pumping lamp , which may be a pulsed gas discharge , flashing on and off like a photographer's elec- tronic flash bulb . It may be wound around the laser rod , positioned ...
Page 172
... light are recombined at a photodetector , a signal at the difference frequency ( the difference in frequency between the original and the shifted light ) is observed , and even small velocities can be measured . The brightness and ...
... light are recombined at a photodetector , a signal at the difference frequency ( the difference in frequency between the original and the shifted light ) is observed , and even small velocities can be measured . The brightness and ...
Page 350
... light ) down to about 4 X 10-5 centimetre ( violet ) . The spectral regions adjacent to the visible band are often referred to as light also , in- frared at the one end and ultraviolet at the other . The speed of light in a vacuum is a ...
... light ) down to about 4 X 10-5 centimetre ( violet ) . The spectral regions adjacent to the visible band are often referred to as light also , in- frared at the one end and ultraviolet at the other . The speed of light in a vacuum is a ...
Contents
progressives had popularized during the leg | 91 |
Consult the INDEX first | 755 |
La Fontaine also called MLLE DE | 792 |
Copyright | |
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