The science of creating elliptically polarized light According to the researchers, twisted light can be produced using the same technology as the 100-year-old Edison bulb (filament light bulb) ...

Edison got serious about electric lighting in 1878 ... (See the video below if you want to see the effect of air on a tungsten filament.) He invented a process for forming thin metal filaments ...

creating a better light bulb. The carbon filament used in Thomas Edison’s world-changing invention wasn’t very energy efficient. Scientists were experimenting with tungsten, which had the ...