Wednesday, Oct 04, 2023 | Last Update : 01:17 PM IST

optical illusion

Scientists step closer to developing Harry Potter-like invisibility cloak

The gadget, called a spectral cloak, even worked in bright daylight in tests.

29 Jun 2018 12:31 PM

Why optical illusion happens

Our choice is the Hering illusion, first described by German physiologist Ewald Hering in 1861.

20 Jan 2017 12:14 AM