how does electric bulb glow
Answers
The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light. ... The filament then heats up and becomes red-hot as a result of this it begins to glow, turning electrical energy into light energy.
Explanation:
The lightbulb has been shedding light in our homes and workplaces since the 1870s. and it’s been doing a sterling job considering the light it creates is a by-product of the chemical processes going on.
Essentially, the lightbulb is a very thin filament of hard-to-melt metal – tungsten, usually – encased in a glass bulb filled with inert gases so that the filament doesn’t oxidise and disintegrate. The electricity causes the wire to glow and a portion of that energy is turned into light.
But, it turns out, the lightbulb might have been more accurately called the ‘heatbulb’ – most of its energy gets turned into heat. Which is why the bulbs are being slowly phased out in favour of alternatives like LED lights.