A Plain Elementary and Practical System of Natural Experimental Philosophy: Including Astronomy and ChronologyHopkins and Earle, 1809 - 538 страници |
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Страница iv
... Light 233 242 250 264 266 274 276 Reflexion of Light 283 Colours of Natural Bodies 287 Of the Rainbow 295 The ... Rays by Refraction 333 . Caustics by Refraction 341 Images of Objects by Refraction 343 Vision through Lenses Of Concave ...
... Light 233 242 250 264 266 274 276 Reflexion of Light 283 Colours of Natural Bodies 287 Of the Rainbow 295 The ... Rays by Refraction 333 . Caustics by Refraction 341 Images of Objects by Refraction 343 Vision through Lenses Of Concave ...
Страница 9
... rays of light , and not by the figure of the glasses . This discovery caused every optician and even sir Isaac Newton himself to despair of perfecting the refracting telescope , and set them upon the construction of reflectors , until ...
... rays of light , and not by the figure of the glasses . This discovery caused every optician and even sir Isaac Newton himself to despair of perfecting the refracting telescope , and set them upon the construction of reflectors , until ...
Страница 24
... rays of light from a candle , of heat from a fire , of effluvia from an odoriferous body , having a given degree of density and strength at a given dis- tance , have four times that strength and density at one half of that distance ...
... rays of light from a candle , of heat from a fire , of effluvia from an odoriferous body , having a given degree of density and strength at a given dis- tance , have four times that strength and density at one half of that distance ...
Страница 30
... rays of light . On the same principles , but by a different praxis , we foliate the inside of a glass globe . For this purpose , melt one ounce of tin or lead with an ounce of marcasite of silver , and add two ounces of mercury . When ...
... rays of light . On the same principles , but by a different praxis , we foliate the inside of a glass globe . For this purpose , melt one ounce of tin or lead with an ounce of marcasite of silver , and add two ounces of mercury . When ...
Страница 31
... rays of light are variously refracted and reflected ; as we shall see in optics . The hardness or softness of bodies depends partly on the number of particles in contact , and partly on their fitting each other so exactly as not easily ...
... rays of light are variously refracted and reflected ; as we shall see in optics . The hardness or softness of bodies depends partly on the number of particles in contact , and partly on their fitting each other so exactly as not easily ...
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altitude angle of incidence angle of refraction aphelion appear apsis atmosphere attraction axis called cause central force circle colour comets concave concave lens converge convex lens degree denser medium descend diameter direction diverge earth ecliptic elastic electricity ellipsis equal equator eye-glass fall fluid focal distance focus glass globe greater greatest half heat Hence hole horizon increased inversely Jupiter latitude length less mean mercury meridian mirror moon moon's motion move nearer node object observed octave orbit parabola parallax parallel particles pass perpendicular plane Plate pole pressure produced projectile proportional quadrature quantity of matter radiant point radius rays of light reflected reflexion retina revolution revolving right ascension round side sine solar sound space specific gravity square root star star's string sun's superior planets supposed surface syzygies tance tangent telescope thereby tion tube velocity vessel vibrations weight whole