(The Gist of Science Reporter) Discovery of New Property of Light  [JANUARY-2020]

(The Gist of Science Reporter) Discovery of New Property of Light

Discovery of New Property of Light

• Researchers from several institutes of Spain and the US have discovered a new property of light.
• Interestingly, the scientists found that light can also be twisted, a property called angular momentum which has highly structured angular momentum known as Orbital Angular Momentum (OAM).
• In These types of beams, mini waves rotate around the centre of the beam in the form of the helix giving it the shape of a doughnut.
• The researchers combined pairs of waves with the same orbital angular momentum and fired them into a cloud of argon gas from where a single twisted croissant-shaped light emerged.
• The researchers finally concluded that there is a force named self-torque responsible for twisting the light as well as altering the speed at which light waves twist. The study was published in Science.

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Courtesy: Science Reporter