Optics Without MathematicsSociety for promoting Christian knowledge, 1883 - 124 páginas |
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Página 7
... quantity of light , be it more or less , that travels from the object to the eye . The whole universe must therefore be full of these wonderful vibrations , crossing each other in every conceivable direction OPTICS WITHOUT MATHEMATICS .
... quantity of light , be it more or less , that travels from the object to the eye . The whole universe must therefore be full of these wonderful vibrations , crossing each other in every conceivable direction OPTICS WITHOUT MATHEMATICS .
Página 12
... whole surface , is con- ceived to be made up of , or to contain , an infinite number of radiants . Rays are either parallel , diverging , or converging . Parallel rays keep always the same distance apart , and never meet either way ...
... whole surface , is con- ceived to be made up of , or to contain , an infinite number of radiants . Rays are either parallel , diverging , or converging . Parallel rays keep always the same distance apart , and never meet either way ...
Página 13
... whole of the light that they receive . Bodies which do not permit the passage of light are called opaque , but many even of these , when reduced to extreme thin- ness , allow a little to pass . What shall we find more opaque - looking ...
... whole of the light that they receive . Bodies which do not permit the passage of light are called opaque , but many even of these , when reduced to extreme thin- ness , allow a little to pass . What shall we find more opaque - looking ...
Página 18
... whole pencil . And since everything is seen in the last direc- tion of the ray , an eye placed in the reflected pencil will suppose that the rays come from behind the mirror . But next , if the rays falling on the plane mirror are ...
... whole pencil . And since everything is seen in the last direc- tion of the ray , an eye placed in the reflected pencil will suppose that the rays come from behind the mirror . But next , if the rays falling on the plane mirror are ...
Página 21
... whole picture , though not inverted , is reversed ; and some curious effects follow . We see ourselves writing with the left hand , and in the same direction with Hebrew or Arabic . The printing of an open book will all run the wrong ...
... whole picture , though not inverted , is reversed ; and some curious effects follow . We see ourselves writing with the left hand , and in the same direction with Hebrew or Arabic . The printing of an open book will all run the wrong ...
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Términos y frases comunes
angles of incidence aperture axis beautiful called candle circle cloth boards colour concave lens concave mirror conjugate foci converging convex lens course crossing crystal crystalline lens curious curves dark direction dispersion distance Double Refraction edge equal angles equi-convex eye-lens Fcap feet focal image focal length form an image fraction front happens hole inches larger lenses look looking-glass magnifying power microscope minute moon Newtonian reflector NORTHUMBERLAND AVENUE object object-glass opposite optical parallel rays perfect perfectly picture plane mirror polarised position prism produce PROMOTING CHRISTIAN KNOWLEDGE properties of light proportion radiant radius rainbow ray passes reflected rays reflecting telescopes refraction retina reverse right angles seen shorter focus side sideways sine Sir EDMUND BECKETT spectrum speculum sphere spherical spherical aberration straight line suppose surface telescope thing tion turned undulations violet waves wonderful
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