A light bulb filament is constructed from 2 cm of tungsten wire of diameter 50 pam and is enclosed in an evacuated glass bulb. What temperature does the filament reach when it is operated at a power of 1 W? (Assume the emissivity of the tungsten surface to be 0.4.)
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![A light bulb filament is constructed from 2 cm of tungsten wire of
diameter 50 pam and is enclosed in an evacuated glass bulb. What
temperature does the filament reach when it is operated at a power of
1 W? (Assume the emissivity of the tungsten surface to be 0.4.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbb5f97cf-b147-4132-ba41-1b1ee938d0cc%2Ff7a2967a-ee65-4085-b39c-f78cb8ad51a0%2F761vjss_processed.jpeg&w=3840&q=75)
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