Hasil (
Bahasa Indonesia) 1:
[Salinan]Disalin!
•A brief illustrationWe can now see why an incandescent lamp is so effective. Before it is switched on, the energy density inside the glass envelope corresponds to about 20°C (293 K). When it is switched on, the temperature of the filament rises to about 2000 K. The energy density increases by a factor of (2000 K/293 K)4 ≈ 2000, and it generates nearly white light. •
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