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Harsijan Singh Ahuja developed UV-21, a robot which can kill bacteria using UVC, which can be controlled with the help of Wi-Fi through. A 360˚ Camera so it can be controlled without coming in contact with the Robot. Ultra violet light at a wavelength of 254 nm (UV-C) is bactericidal, sporadical and fungicidal. Shadowing with UV-C light, where some surfaces are not exposed due to obstruction or inaccessibility, significantly reduces UV-C intensity and thus limit an efficient disinfection process. UV-21 is listed with India Book of Records.