Wearing reflective materials helps other people to see you in the dark; however, they will only work when a source of light - such as a torch, lamp or candle - reflects off them. Students could ...

Discover the science behind mirrors and glass, from electron behavior to topological materials, explained by IIT Kanpur professor.

Image caption, When the Sun ray hits the black umbrella some of the light is reflected back but some is also absorbed by the dark material.

A property of a material that changes the speed of light, computed as the ratio of the speed of light in a vacuum to the speed of light through the material. When light travels at an angle between ...

The researchers wondered what would happen if they abruptly ended such a waveguide, with a "wall" of material ... the light amplification is related to the topological suppression of back reflection.