This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Teslabulb. SerbianAmerican inventor Nikola Tesla demonstrating wireless power transmission probably in his New York laboratory in the The bulb is prototype fluorescent light he invented consisting of partially evacuated glass bulb with single metal electrode Nearby but not visible there is one of his Tesla coil high voltage oscillators