Scientists discover a new property of Light based on Angular Momentum

Posted on:24 May 2016 09:07:46

Scientists discover a new property of Light based on Angular Momentum
24 May 2016 Current Affairs GK: Scientists in a breakthrough discovery in May 2016 discovered a new property of light that can alter our basic understanding of fundamental nature of light like the way light behaves and how it is useful.

The discovery was made by researchers from Trinity College Dublin’s School of Physics and CRANN Institute.The research was published in the journal Science Advances.

The discovery was made while passing light through crystals. During this process scientists spotted this unexpected new property of light, which is based on the concept called 'angular momentum'.

Angular momentum measures how much a beam of light is rotating and physicists have always thought that in all forms of light the angular momentum would be a multiple of Planck’s constant, the physical constant that sets the scale of quantum effects.

The new property of light discovered : As against this, scientists discovered angular momentum behaves in very different way. They found that each photon (a particle of visible light) can have half-integer values of angular momentum. In other words, angular momentum of each photon takes only half of this value.It is this property which causes a beam of light to be confined to fewer than three dimensions.

How the discovery is significant : The discovery will have real impacts for the study of light waves in areas such as secure optical communication opening up possibility for faster internet connections.

It would enable strange new possibilities, including particles whose quantum numbers were fractions of those expected.The discovery shows, for the first time that the speculations on how quantum mechanics works for particles that are free to move in only two of the three dimensions of space, can be realised with light.

How the discovery was made : The team used an effect discovered in the same institution almost 200 years earlier. In the 1830s, mathematician William Rowan Hamilton and physicist Humphrey Lloyd found that, upon passing through certain crystals, a ray of light became a hollow cylinder.

 

Gk Current Affairs April 2017

29 APRIL
NEWS
28 APRIL
NEWS
27 APRIL
NEWS
26 APRIL
NEWS

Gk Current Affairs March 2017

31 MARCH
NEWS
30 MARCH
NEWS
29 MARCH
NEWS
28 MARCH
NEWS

Gk Current Affairs February 2017

28 FEBRUARY
NEWS
27 FEBRUARY
NEWS
25 FEBRUARY
NEWS
24 FEBRUARY
NEWS




Get Daily Current Affairs to your Email

You can Unsubscribe us at any time.

Get Daily Current Affairs to your Email

You can Unsubscribe us at any time.