The Nature of Light, with a General Account of Physical OpticsHenry S. King & Company, 1875 - 356 стор. |
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Сторінка 16
... consequently partially illuminated . It is termed the half shadow or penumbra . Fig . 8 shows the case of a large luminous sphere , A , opposite which is a smaller opaque one , B ; the simple construction shows what determines B พ ...
... consequently partially illuminated . It is termed the half shadow or penumbra . Fig . 8 shows the case of a large luminous sphere , A , opposite which is a smaller opaque one , B ; the simple construction shows what determines B พ ...
Сторінка 19
... consequently be composed of parallel rays . 13. If now the chamber be completely darkened , and a very small opening of from 1-3 millimètres ( th — 1th of an inch ) be made in the shutter , a very pretty appearance may be observed upon ...
... consequently be composed of parallel rays . 13. If now the chamber be completely darkened , and a very small opening of from 1-3 millimètres ( th — 1th of an inch ) be made in the shutter , a very pretty appearance may be observed upon ...
Сторінка 23
... consequently reflects less FIG . 12 . Bunsen's Photometer . than the unstained part of the paper . If therefore the paper be illuminated more strongly from behind , it appears bright on a dark ground . On the other hand , it appears ...
... consequently reflects less FIG . 12 . Bunsen's Photometer . than the unstained part of the paper . If therefore the paper be illuminated more strongly from behind , it appears bright on a dark ground . On the other hand , it appears ...
Сторінка 28
... consequently represents the perpendicular . If now a small beam of parallel rays be allowed to pass through the slit and fall on the mirror , the reflexion will illuminate and make visible that part of the circumference of the circle ...
... consequently represents the perpendicular . If now a small beam of parallel rays be allowed to pass through the slit and fall on the mirror , the reflexion will illuminate and make visible that part of the circumference of the circle ...
Сторінка 30
... consequently the reflected rays as if the point a , from which they appear to proceed , were itself the luminous point . It sees in , that is to say , behind the mirror , the point a as the image of the luminous point A , situated in ...
... consequently the reflected rays as if the point a , from which they appear to proceed , were itself the luminous point . It sees in , that is to say , behind the mirror , the point a as the image of the luminous point A , situated in ...
Загальні терміни та фрази
absorption æther angle of incidence angle of refraction aperture appears beam blue body bright lines carbon points centre circle colour consequently convex convex lens corresponding Crown 8vo crown glass crystal dark lines Demy 8vo difference of path diffraction direction double refraction elementary waves equal exhibit fasciculus Fcap flame flint glass fluorescence focal distance green half wave-length Heliostat homogeneous Iceland spar illuminated Illustrations incident rays index of refraction International Scientific Series lens lenses luminous point marginal rays metal Nicol's prism object observed optic axis parallel particles pass perpendicular phenomena placed plane of vibration polariscope polarised ray position Post 8vo principal plane prism propagated Quartz ray of light reflected reflexion refracted ray refracting angle refrangible regarded right angles rotated screen Second Edition seen slit Sodium solar spectrum source of light spectra surface telescope thickness tion traverse tube undulatory vapour velocity vertical violet vols whilst yellow
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