Empilweni yangempela, ngenxa yejubane lokukhanya, sithuthukisa ukukhanya ukuze sidlulise ulwazi.
Njengoba nje sivame ukusebenzisa izwi ukuze sikhulume, uma umuntu efuna ukukhuluma, udinga ukusekelwa kwezicubu zesitho sezwi.Isibonelo, umphimbo wethu ungenye yezitho zezwi ezibaluleke kakhulu, futhi-ke, izicubu zezwi ngaphakathi komphimbo wethu zibaluleke kakhulu.
Ngokufanayo, uma sifuna ukusebenzisa ukukhanya ukuze kusisize sikhulume, sidinga nesitho esikhanyayo.Imojula yokukhanya ifana nomphimbo, futhi idivayisi ekhanyayo ingafaniswa nezicubu zentambo yezwi, ebizwa ngokuthi i-tosa.
Yiqiniso, ukuxhumana kuyinqubo yokuxhumana, ngakho-ke ngaphezu kokukhuluma, akwanele, kodwa futhi kuyadingeka ukuze ukwazi ukulalela.Emzimbeni womuntu, sinezindlebe zokusisiza silalele.Ngokufanayo, ekuxhumaneni kwe-optical, sinamamojula athola ukukhanya.Amadivayisi angathola ukukhanya ahambisana ne-tympanum engaphakathi endlebeni, esiyibiza ngokuthi i-rosa.Ithuluzi elikwazi ukukhuluma nokulalela libizwa ngokuthi i-bosa.
Kodwa-ke, empilweni yangempela, lokho thina ngabanye esingakwazi ukukuzwa kunqunywa ngemva kokuzalwa noma ngemva kwesikhathi sokushintsha umsindo.Ngokuvamile, u-A akakwazi ukwenza umsindo ka-B, futhi u-B akakwazi ukwenza umsindo ka-A. Okufanayo kuyiqiniso kumamojula abonakalayo.Ngemodi eyodwa, imojula A ayikwazi ukukhipha ubude begagasi bemojuli B. Kuyafana nakumamukeli.Ngemodi eyodwa, imojuli ye-optical ayikwazi ukuhlukanisa.Kufanele umtshele ukuthi ubani okhulumayo (usebenzisa imojuli ehambisana nobude beza bokukhanya) ngaphambi kokuthi athole ulwazi.
“Imojuli ewubulima enjalo ayikwazi ukuhlangabezana nezidingo ezingokoqobo, ngakho-ke singanxephezela lokhu ngokusebenzisa imojula yokubona engaxhunywa futhi iphume kalula.Kuleli qophelo, imojuli ye-optical ilingana ne-transformer yomsindo, futhi ungenza noma yimuphi umsindo (imuphi ubude be-wavelength) ofuna iwukhiphe.”.