Человек-невидимка

Certain First Principles

           "Phew!"saidKemp. "That'sodd!ButstillIdon'tseequite... Icanunderstandthattherebyyoucouldspoilavaluablestone,butpersonalinvisibilityisafarcry." 

           "Precisely,"saidGriffin. "Butconsider,visibilitydependsontheactionofthevisiblebodiesonlight. Eitherabodyabsorbslight,oritreflectsorrefractsit,ordoesallthesethings. Ifitneitherreflectsnorrefractsnorabsorbslight,itcannotofitselfbevisible. Youseeanopaqueredbox,forinstance,becausethecolourabsorbssomeofthelightandreflectstherest,alltheredpartofthelight,toyou. Ifitdidnotabsorbanyparticularpartofthelight,butreflecteditall,thenitwouldbeashiningwhitebox. Silver!Adiamondboxwouldneitherabsorbmuchofthelightnorreflectmuchfromthegeneralsurface,butjusthereandtherewherethesurfaceswerefavourablethelightwouldbereflectedandrefracted,sothatyouwouldgetabrilliantappearanceofflashingreflectionsandtranslucencies—asortofskeletonoflight. Aglassboxwouldnotbesobrilliant,norsoclearlyvisible,asadiamondbox,becausetherewouldbelessrefractionandreflection.Seethat? Fromcertainpointsofviewyouwouldseequiteclearlythroughit.Somekindsofglasswouldbemorevisiblethanothers,aboxofflintglasswouldbebrighterthanaboxofordinarywindowglass. Aboxofverythincommonglasswouldbehardtoseeinabadlight,becauseitwouldabsorbhardlyanylightandrefractandreflectverylittle. 

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Roboto Lora
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