the filament of a light bulb operates at 2,000 K. It has diameter of 0.80mm and is made of metal of emissivity o.50. What length of the filament is needed if the power of the bulb is 100w
the filament of a light bulb operates at 2,000 K. It has diameter of 0.80mm and is made of metal of emissivity o.50. What length of the filament is needed if the power of the bulb is 100w