Burnt Out

As I was trying to figure out what to write about for my physics blog, I happened to look up and stare at the chandelier. I noticed that the light bulb was burnt out and when I thought about the light bulb, I thought about why the light bulb was no longer bright like its companions.
Inside a light bulb is a filament that glows from heat energy from excited electrons that gets converted into light energy as those electrons are travelling through the filament. The filament has a high boiling point so that it can take more electrons before the electrons are converted into light energy. The filament is very twisted to create a higher resistance so that the electrons have a harder time travelling through it. Resistance relies on the wire's length, cross-sectional area and the resistivity of the material. The filament is actually very long because it was curled tightly. At some point the filament is no longer usable, making the lightbulb die.

All of the other lightbulbs are very bright. They have a current running through them. Current depends on the voltage difference and the resistance. Current can also be calculated by the charge in coulombs divided by the amount of time.

In the picture, I didn't draw all of the light bulbs.