An Elementary Treatise on Optics, Band 1Taylor, 1851 - 198 Seiten |
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Häufige Begriffe und Wortgruppen
accurate achromatic adapt the standard angle of incidence angle of refraction aperture axis chromatic dispersion colours concave lens conjugate foci converging pencils convex lens cornea dense medium deviation direct pencils distant object distinct vision diverging pencil emergent rays eye-glass eye-lens eye-piece field of view figure find the focus glass Gregorian telescope incident pencil incident rays lenses Let Q luminous point magnifying power microscope nearly Newtonian telescope object-glass oblique parallel rays pencil diverging pencil incident pencil of parallel pencil of rays perpendicular plane mirror plane surface plano-convex plate point Q position principal focal length principal focus prism PROP propositions Q and q q lies radius rays is incident reflected reflecting telescopes reflexion refracted pencil refracted rays refractive index retina screen second surface seen shew shewn small pencil spectrum speculum spherical surface subtends telescope ре
Beliebte Passagen
Seite 6 - surface at the point of incidence is called the angle of incidence The angle which the reflected ray makes with the same perpendicular is
Seite 44 - It is found by experiment that if a ray of light passes through a series of plates of dense media, all the refracting surfaces being parallel planes, that the emergent ray is parallel to the incident ray.
Seite 7 - the incident ray, the normal to the reflecting surface at the point of incidence, and the reflected ray,
Seite 45 - ray in passing through any one of the plates is parallel to the course it would have taken if it had entered the plate directly.
Seite 5 - the composition of the velocity of light with the velocity of the earth in its orbit
Seite 3 - change in the direction of light, when it passes from one medium to another of different density,
Seite 74 - of the spherical surfaces when both are curved ; and the line perpendicular to the plane surface which passes through the
Seite 8 - refraction bears a constant ratio to the sine of the angle of
Seite 113 - r and s be the radii of the first and second surfaces of the lens respectively,
Seite 89 - the point where a line joining the extremities of two parallel radii of the