The Nature of Light, with a General Account of Physical OpticsHenry S. King & Company, 1875 - 356 стор. |
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Сторінка 41
... incidence on that each ray of light impinges can alone be considered to act as a reflector . The smaller we admit the superficial area of this part to be - and we may conceive it to be as small as we please -so much the more accurately ...
... incidence on that each ray of light impinges can alone be considered to act as a reflector . The smaller we admit the superficial area of this part to be - and we may conceive it to be as small as we please -so much the more accurately ...
Сторінка 42
... incidence . Since every radius of a spherical surface is perpen- dicular to the surface where it meets it , we obtain the axis of incidence of a spherical concave mirror by simply drawing the corresponding radius to the point of incidence ...
... incidence . Since every radius of a spherical surface is perpen- dicular to the surface where it meets it , we obtain the axis of incidence of a spherical concave mirror by simply drawing the corresponding radius to the point of incidence ...
Сторінка 51
... incidence ) , the angle i , the reflected ray bg makes with the axis of incidence the corresponding and equal angle r . The angle x , which the radius Cb and axis include , is obviously equal to the angle i , and consequently also to ...
... incidence ) , the angle i , the reflected ray bg makes with the axis of incidence the corresponding and equal angle r . The angle x , which the radius Cb and axis include , is obviously equal to the angle i , and consequently also to ...
Сторінка 52
... incidence from the axis of the mirror . The angle bFd may , however , be expressed in another way ; for example , it may be said c bFd = ; b F or again , because on account of the smallness of the angle bFd the line b F is scarcely ...
... incidence from the axis of the mirror . The angle bFd may , however , be expressed in another way ; for example , it may be said c bFd = ; b F or again , because on account of the smallness of the angle bFd the line b F is scarcely ...
Сторінка 53
... incidence and the angle of reflexion are both = d , and the reflected ray cuts the axis at the point B at an angle ß . If now the angle which the axis of incidence drawn towards b makes with the axis be in- dicated by y , we obtain ...
... incidence and the angle of reflexion are both = d , and the reflected ray cuts the axis at the point B at an angle ß . If now the angle which the axis of incidence drawn towards b makes with the axis be in- dicated by y , we obtain ...
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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