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катодна

Metal filaments that emit electrons in a fluorescent lamp. Negatively charged free electrons emitted by the cathode are attracted to the positive electrode (anode), creating an electric current between the electrodes.

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Belo

Bela je boja visokog sjaja ali bez pigmenta. Tačnije sadrži sve boje elektromagnetskog spektra i takođe je zvana i ahromatskom bojom. Crno je odsustvo ...