A Text-book of PhysicsLongmans, Green, and Company, 1902 - 951 páginas |
Dentro del libro
Resultados 1-5 de 89
Página 302
... incident radiation . Although no such perfectly black body is known , yet a surface coated with lamp - black or platinum - black absorbs such a large proportion of the incident radiation of all wave - lengths as to sufficiently nearly ...
... incident radiation . Although no such perfectly black body is known , yet a surface coated with lamp - black or platinum - black absorbs such a large proportion of the incident radiation of all wave - lengths as to sufficiently nearly ...
Página 303
... incident radiation , can be determined . An instrument in which the rise in temperature of a blackened metal strip is measured in another way is the bolometer invented by Langley . The thin strip of blackened metal forms one of the arms ...
... incident radiation , can be determined . An instrument in which the rise in temperature of a blackened metal strip is measured in another way is the bolometer invented by Langley . The thin strip of blackened metal forms one of the arms ...
Página 304
... incident radiation , yet possesses the pro- perty of absorbing very nearly , if not quite , the same proportion of the incident radiation whatever the wave - length , and so this substance is taken as a standard . In a series of ...
... incident radiation , yet possesses the pro- perty of absorbing very nearly , if not quite , the same proportion of the incident radiation whatever the wave - length , and so this substance is taken as a standard . In a series of ...
Página 305
... incident radiation was concentrated on the thermometer bulb by means of a lens fixed in the side of the closed box in which the thermo- meter bulb was fixed . If Q is the quantity of radiation ( measured in ergs ) which falls on the ...
... incident radiation was concentrated on the thermometer bulb by means of a lens fixed in the side of the closed box in which the thermo- meter bulb was fixed . If Q is the quantity of radiation ( measured in ergs ) which falls on the ...
Página 306
... incident radiation , reflected part of the radiation they received back to the radiating surface where reflection again took place , and so some of this doubly reflected heat was thrown on to the thermopile . This error was particularly ...
... incident radiation , reflected part of the radiation they received back to the radiating surface where reflection again took place , and so some of this doubly reflected heat was thrown on to the thermopile . This error was particularly ...
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Términos y frases comunes
amplitude angle of incidence axis Boyle's law called calorimeter carbon dioxide centimetre Charles's laws circle coefficient colours column constant convex lens corresponding curvature curve cylinder density direction displacement distance equal equation force acting fork frequency gases given glass Hence horizontal hydrogen incident increase interval kinetic energy length lens light liquid magnet mass measured medium mercury mirror molecules motion moving object obtained octave overtones parallel particle pass pendulum perpendicular piston plane plate pole portion position pressure prism produced quantity of heat radiation radius ratio reflected rays refracted ray refractive index represent resonator right angles rotation scale shown in Fig solid sound-waves sounding body specific heat sphere straight line string substance suppose surface tension T₁ temperature tion tone tube unit vapour velocity of sound vertical vessel vibrations volume wave-front wave-length waves weight
Pasajes populares
Página 580 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.