Asked by Megan
Why does the filament glow more brightly as the electric current in a lightbulb is increased?
The glow is dependent on two things: Spectral output, and intensity.
Current makes the temperature hotter, and so the spectrum is shifted from red to violet, which is more energetic. Also, more current increases the rate of light emission (intensity).
The glow is dependent on two things: Spectral output, and intensity.
Current makes the temperature hotter, and so the spectrum is shifted from red to violet, which is more energetic. Also, more current increases the rate of light emission (intensity).
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