The Pressure of LightSociety for Promoting Christian Knowledge, 1910 - 103 страници |
Между кориците на книгата
Резултати 1 - 5 от 19.
Страница 5
... greater detail than was possible in any one lecture . For readers who desire to study the mathe- matical calculations involved in the theory of the subject , a series of notes is appended . July 1910 . CONTENTS CEAP . I HOW LIGHT EXERTS ...
... greater detail than was possible in any one lecture . For readers who desire to study the mathe- matical calculations involved in the theory of the subject , a series of notes is appended . July 1910 . CONTENTS CEAP . I HOW LIGHT EXERTS ...
Страница 13
... greater than the pressure of the light . When they worked in a vacuum probably another action came into play , an action discovered and investigated by Sir William Crookes , who invented a beautiful little instrument to show it , which ...
... greater than the pressure of the light . When they worked in a vacuum probably another action came into play , an action discovered and investigated by Sir William Crookes , who invented a beautiful little instrument to show it , which ...
Страница 14
... greater kick back against it than if they rebounded at the same speed . Those which come up on the other cooler side go back with the same velocity with which they came up and do not give an increased kick back . Thus the residual air ...
... greater kick back against it than if they rebounded at the same speed . Those which come up on the other cooler side go back with the same velocity with which they came up and do not give an increased kick back . Thus the residual air ...
Страница 23
... greater than the pull on D in ( b ) , for the slope of the cord is greater , and its tension is more inclined to FP . If , as we suppose , the displacement is only small , the slope in ( c ) is double that in ( b ) and the pull along FP ...
... greater than the pull on D in ( b ) , for the slope of the cord is greater , and its tension is more inclined to FP . If , as we suppose , the displacement is only small , the slope in ( c ) is double that in ( b ) and the pull along FP ...
Страница 29
... worked out fully it is found that the pressure is greater when the source is moving forward than when it is at rest , and that 1 Note 2 , p . 84 . rest . when it is moving back it is less HOW LIGHT EXERTS PRESSURE 29.
... worked out fully it is found that the pressure is greater when the source is moving forward than when it is at rest , and that 1 Note 2 , p . 84 . rest . when it is moving back it is less HOW LIGHT EXERTS PRESSURE 29.
Други издания - Преглед на всички
Често срещани думи и фрази
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
Популярни откъси
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.