When an obstacle is put in the path of liquid jet, while jet meets some specifications, standing waves are created upstream of the obstacle. If the contact point of jet and obstacle is illuminated by laser beams, those standing waves act like an optical fiber and keep the light inside the jet. Laser beams after multiple internal reflections inside the jet, create rings of light around the jet. In this paper, first we investigate the phenomena in terms of fluid mechanics, determining the wavelength of standing waves and, as the second part, we examine the rings in terms of optics.
LIGHT RINGS
When an obstacle is put in the path of liquid jet, while jet meets some specifications, standing waves are created upstream of the obstacle. If…