Buy AumSum Merchandise: https://www.aumsum.com/ How does a Light Bulb Glow? A bulb glows because of the Principle of Conversion of Energy which states that energy is converted from one form to another. In this case electrical energy is converted to heat plus light. Let us see how this happens. When we switch on the bulb, electricity starts flowing, this electricity or the flow of electrons is hindered by the filament of the bulb. The filament is usually made of tungsten as it has a high melting point. A long and thin filament wire offers higher resistance to the flow of electrons. Now this hindrance to the flow of electrons leads to the creation of friction which causes the filament to heat up and start glowing. So this is how a light bulb glows. Reference: https://www.youtube.com/watch?v=rp09r-Z1SmY Timecodes 0:00 - How does a Light Bulb Glow? 1:07 - What if Bulbs & Tube Lights Disappeared? 2:20 - Why does a match light when you strike it? 4:05 - Why do we see lightning before thunder? 5:17 - Why do buildings have lightning rods? 6:11 - What happens if a plane is struck by lightning? 7:08 - Why can't we travel faster than the speed of light? 9:53 - Why is nuclear fusion not used to generate electricity?