Harnessing the power of defects to improve metallic alloys

Two new studies from the Indian Institute of Bombay (IIT Bombay), Mumbai, show the importance of defects in the arrangement of atoms in a crystal, called dislocations, in shaping the physical properties of metallic alloys.


Read time: 1 min 27 January, 2018 - 08:20

Wormholes are the stuff of sci-fiction, which transport space travellers through cosmic distances in minutes! But, is this really possible?

Through the theory of general relativity, Einstein united space and time giving us 'space-time continuum'. This continuum consists of 4 dimensions -- length, breadth, height and time. Let's imagine it as 2 dimensional sheet of paper. Now, if we connect any 2 points on this sheet, it would represent the conventional path of space travel. But, if we fold this sheet over and pierce through the points with a sharp object, the distance is greatly reduced. This is essentially what a wormhole is!

A wormhole is also called as the “Einstein-Rosen Bridge”. It is named after Nathan Rosen and Albert Einstein, who theoretically predicted their existence. According to this, space-time can be so folded and curved that two distinct places could be joined in space by a bridge, allowing instantaneous travel in space and time and even other universes!

But astronomers are yet to physically observe them. Many predict that wormholes are very small in size -- about 10-33 centimeters. Some also hypothesize that wormholes could collapse if a particle enters it, due to change in energy.

We might be a long way to being transported intergalactic distances through wormholes, but they sure do transport our imagination to new heights.