German scientists have designed a three-dimensional "invisibility cloak" that can make objects invisible by bending light waves.

As per the study, an object can be made invisible by changing the speed & direction of the light. It means that objects can be made invisible by changing the material's refractive index.

The findings that published in the journal Science could make it possible to make large objects invisible.

Speaking on the topic, lead researcher Tolga Ergin said, “We put the carpet cloak on top of that bump and it bends the light so that the distortions disappear.”

Scientists used photonic crystals to make the invisibility cloak. Then they used the cloak to conceal a small bump, just like hiding a small object beneath a carpet and then they made both the bump and the carpet invisible.

Earlier, invisibility devices had been able to hide an object from only one direction, keeping the object visible from any other direction.