The Pressure of LightSociety for Promoting Christian Knowledge, 1910 - 103 страници |
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Страница 7
... MOMENTUM BY A BEAM OF LIGHT 52 V THE PRESSURE OF LIGHT IN ASTRONOMY . SOME POSSIBLE CONSEQUENCES 69 NOTE I LIGHT - PRESSURE ON THE CORPUSCULAR THEORY 83 II THE PRESSURE DUE ΤΟ WAVES ISSUING 84 NORMALLY FROM A SURFACE III THE PRESSURE OF ...
... MOMENTUM BY A BEAM OF LIGHT 52 V THE PRESSURE OF LIGHT IN ASTRONOMY . SOME POSSIBLE CONSEQUENCES 69 NOTE I LIGHT - PRESSURE ON THE CORPUSCULAR THEORY 83 II THE PRESSURE DUE ΤΟ WAVES ISSUING 84 NORMALLY FROM A SURFACE III THE PRESSURE OF ...
Страница 11
... momentum . They carry this momentum and give it up to the disc when they hit it . This giving up of momentum is pressure . In the eighteenth century , when the Corpuscular Theory of Light flourished , many experiments were made to HOW ...
... momentum . They carry this momentum and give it up to the disc when they hit it . This giving up of momentum is pressure . In the eighteenth century , when the Corpuscular Theory of Light flourished , many experiments were made to HOW ...
Страница 21
... momentum with them just as surely as if they were moving particles on the old corpuscular theory . This was first pointed out by Bartoli in 1875 , and the proof was put in a precise and simple form by Sir Joseph Larmor . The fundamental ...
... momentum with them just as surely as if they were moving particles on the old corpuscular theory . This was first pointed out by Bartoli in 1875 , and the proof was put in a precise and simple form by Sir Joseph Larmor . The fundamental ...
Страница 30
... momentum , just as certainly as if they were a rush of corpuscles , and the waves carry this momentum forward into space . We need not suppose that the waving material rushes forward . It hands on the momen- We may illustrate this tum ...
... momentum , just as certainly as if they were a rush of corpuscles , and the waves carry this momentum forward into space . We need not suppose that the waving material rushes forward . It hands on the momen- We may illustrate this tum ...
Страница 31
... momentum into them . They rush out carrying the momentum with them , and when they are clear of A , i . e . when A has ceased to pour out momentum , it is no longer pressed . The momentum is now being carried through mid space as at c ...
... momentum into them . They rush out carrying the momentum with them , and when they are clear of A , i . e . when A has ceased to pour out momentum , it is no longer pressed . The momentum is now being carried through mid space as at c ...
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angle beam of light black disc black surface blackened calculated circular cloth boards comets convection corpuscles corpuscular theory cubic centimetre deflexion density diameter direction Doppler dynes earth earth's distance effect electric electrified plate emitted energy per cubic ergs exerted experiment Fcap fluorite forward front face give glass gravitation constant gravitative pull greater heat hemisphere incident beam Lebedew light force light-pressure limp cloth magnetic measured medium millionth motion Nernst lamp normal NORTHUMBERLAND AVENUE Note observed torque orbit particles perpendicular Post 8vo PRESSURE OF LIGHT Professor push quartz fibre radiation radiometer action radius refracting repelled repulsion rise in temperature round the sun says shown in fig side sideways solar Solar Constant spinning square centimetre sunlight suppose suspended system tail telescope tion tubes of force UNIVERSITY OF BIRMINGHAM University of Cambridge vacuum velocity of light wave-length waves αρ
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Страница 34 - A flat body exposed to sunlight would experience this pressure on its illuminated side only, and would therefore be repelled from the side on which the light falls. It is probable that a much greater energy of radiation might be obtained by means of the concentrated rays of the electric lamp. Such rays falling on a thin metallic disk, delicately suspended in a vacuum, might perhaps produce an observable mechanical effect.
Страница 82 - The Sun cannot tolerate dust. With the pressure of his light he drives the finest particles altogether away from his system. With his heat he warms the larger particles. They give out this heat again and with it some of that energy which enables them to withstand his attraction. Slowly he draws them to himself and at last they unite with him and end their separate existence.