eftersom jag skapat en tråd kan jag väl lika bra posta det jag skrivit och kanske få lite feedback... Ska alltså inte vara mycket mer än detta, vi är 3 personer och det skulle vara samanlagt 1-2 sidor.
"The light bulb has improved a lot since Thomas Edison invented it. Edison used a cellulose layer as glowing filament but today we’re using wolfram which is a metallic element that can withstand much higher temperatures than the cellulose layer. The shape of the light bulb is also changed. Nowadays it’s more oval than it was when Edison invented it. A third thing that’s different from the days of Edison is the shiny metallic cap which we have on our light bulbs today.
The light bulb is a very important invention even if some people don’t consider it to be. Today’s society is depending on the light bulb. It’s used everywhere. On our roads as streetlight, on air planes and in our houses just to mention a few places. Without electrical light the industry wouldn’t operate and we wouldn’t be able to drive after sunset.
The light bulb is one of many reasons to why our energy resources are running short. For that reason they are being replaces with so called LED-lamps. LED-lamps have much more efficient light on the same amount of energy than the light bulb has. The LED-lamps is a step in the right direction, but we need greater improvements than that, if our energy resources are going to last."