Six Lectures on Light: Delivered in the United States in 1872-1873Longmans, Green, 1895 - 244 páginas |
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Página 32
... quenched or absorbed , but in great part sent back to the eye . Place the same ribbon in the green of the spectrum ; it is black as jet . It absorbs the green light , and leaves the space on which it falls a space of intense darkness ...
... quenched or absorbed , but in great part sent back to the eye . Place the same ribbon in the green of the spectrum ; it is black as jet . It absorbs the green light , and leaves the space on which it falls a space of intense darkness ...
Página 33
... quenching the green , and the green sifts it by quenching the red , both exhibiting the residual colour . The process ... quenched by the other . In this way , by the union of two transparent substances we obtain a combination as dark as ...
... quenching the green , and the green sifts it by quenching the red , both exhibiting the residual colour . The process ... quenched by the other . In this way , by the union of two transparent substances we obtain a combination as dark as ...
Página 35
... quench all the light ; and if from the interior of the water no light reaches the eye , we have the condition necessary to produce blackness . Looked properly down upon there are portions of the Atlantic Ocean to which one would hardly ...
... quench all the light ; and if from the interior of the water no light reaches the eye , we have the condition necessary to produce blackness . Looked properly down upon there are portions of the Atlantic Ocean to which one would hardly ...
Página 38
... quenched the middle . This furnished an easy explana- tion of the effect . In the delicate spring foliage the blue of the solar light is for the most part absorbed , and a light , mainly yellowish green , but containing a con- siderable ...
... quenched the middle . This furnished an easy explana- tion of the effect . In the delicate spring foliage the blue of the solar light is for the most part absorbed , and a light , mainly yellowish green , but containing a con- siderable ...
Página 51
... quenched— hidden from the appreciative intellect of his country- men - deemed in fact a dreamer , through the vigorous sarcasm of a writer who had then possession of the public ear , and who in the Edinburgh Review poured ridicule upon ...
... quenched— hidden from the appreciative intellect of his country- men - deemed in fact a dreamer , through the vigorous sarcasm of a writer who had then possession of the public ear , and who in the Edinburgh Review poured ridicule upon ...
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Palavras e frases frequentes
action analyzer aperture appear augmented axis beam beautiful blue bodies bright bright bands cause centre CIRCULAR POLARIZATION Cloth cloud colours cross crystal dark band Descartes directions of vibration discovery distance double refraction effect electric emission Emission Theory employed ether experiment fact film flame glass green gypsum Iceland spar illustrate incident intellect intense interference invisible invisible rays Kirchhoff lamp lectures lens liquid luminiferous ether luminous magnet metal mind molecules motion Nature needle Newton Newton's rings Nicol Nicol prism obliquity observed obtained optical ordinary particles pass perpendicular phenomena planes of vibration polarized light portion prism produced proved quenched radiant heat rays refrangible regards rendered retina rings rotation round scientific screen seen selenite slit solar sound space spectra spectrum substances surface thallium thickness thin Thomas Young tion tourmaline transmitted transparent Tyndall ultra-red undulatory theory vapour velocity violet white light yellow
Passagens conhecidas
Página 228 - You may erect laboratories and endow them ; you may furnish them with all the appliances needed for enquiry ; in so doing you are but creating opportunity for the exercise of powers which come from sources entirely beyond your reach. You cannot create genius by bidding for it. In biblical language, it is the gift of God ; and the most you could do, were your wealth, and your willingness to apply it, a million-fold what they are, would be to make sure that this glorious plant shall have the freedom,...
Página 56 - For Nature beats in perfect tune, And rounds with rhyme her every rune, Whether she work in land or sea, Or hide underground her alchemy. Thou canst not wave thy staff in air, Or dip thy paddle in the lake, But it carves the bow of beauty there, And the ripples in rhymes the oar forsake.