Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
Dentro del libro
Resultados 1-5 de 41
Página 861
... telescope . Its peculiarities . Opera - glass , 1033. Reflecting telescopes , 1034. Silvered specula , 1035. Measure ... telescope is equal to brightness of object . Effective brightness is the same if magnifying power does not exceed ...
... telescope . Its peculiarities . Opera - glass , 1033. Reflecting telescopes , 1034. Silvered specula , 1035. Measure ... telescope is equal to brightness of object . Effective brightness is the same if magnifying power does not exceed ...
Página 929
... telescope , as in Fig . 633 , Fig . 634. - Lissajous ' Figures , Unison , Octave , and Fifth . or with the naked eye . In this form of the experiment , a lamp sur- rounded by an opaque cylinder , pierced with a small hole just opposite ...
... telescope , as in Fig . 633 , Fig . 634. - Lissajous ' Figures , Unison , Octave , and Fifth . or with the naked eye . In this form of the experiment , a lamp sur- rounded by an opaque cylinder , pierced with a small hole just opposite ...
Página 956
... telescope ; the object- glass of the telescope is so adjusted as to render the rays parallel on emergence , and in this condition they traverse the interval VELOCITY OF LIGHT . 957 between the two stations . Fig . 649. - Fizeau's ...
... telescope ; the object- glass of the telescope is so adjusted as to render the rays parallel on emergence , and in this condition they traverse the interval VELOCITY OF LIGHT . 957 between the two stations . Fig . 649. - Fizeau's ...
Página 960
... telescope furnished with two parallel wires near together in the focus of its eye - piece , between which the image was made to fall . This telescope was so mounted that , while always directed centrally on the revolving mirror , it ...
... telescope furnished with two parallel wires near together in the focus of its eye - piece , between which the image was made to fall . This telescope was so mounted that , while always directed centrally on the revolving mirror , it ...
Página 961
... telescopes of very moderate power ; and being visible at the same absolute time at all parts of the earth's surface at which they are visible at all , they serve as signals for comparing local time at different places , and thus for ...
... telescopes of very moderate power ; and being visible at the same absolute time at all parts of the earth's surface at which they are visible at all , they serve as signals for comparing local time at different places , and thus for ...
Otras ediciones - Ver todas
Términos y frases comunes
achromatic analyser angle of incidence beam body bright lines called centimetres centre coincidence colours concave mirror conjugate foci convex convex lens crystal curvature denote diameter direction distance employed equal experiment eye-piece flame focal length frequency of vibration fundamental note glass harmonics Hence Iceland-spar incident ray index of refraction interval inverted law of sines lens lenses luminous point magnifying power medium metres minimum deviation nearly node normal number of vibrations object object-glass oblique observer obtained octave optical ordinary parallel particles pencil perpendicular pipe pitch placed plane mirror plate polarization portion position principal axis principal focus prism produced propagation radius rarefaction ratio reflected rays refrangibility represented retina rotation screen seen side slit solar spectra spectrum spherical string subtends surface telescope tion tone traversing tube undulation velocity of sound vertical vibrations vibrations per second violet virtual image visual angle wave-front wave-length waves