Concentrating light in a volume as small as the wavelength itself is a challenge that is crucial for numerous applications.

They are shaped in a way that refracts light so it focuses at a point. Just like ray diagrams showing reflection, all angles are measured from the normal – a line at 90° to the refracting surface.

When a wave or light ray moves from one medium to another its speed changes. The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays.

Ray explains the origins of light, its crucial role in visibility, and how it interacts with various surfaces through reflection and refraction. The film covers topics such as the speed of light ...

Liter of Light helps poor communities around the world ... They are then fixed to roofs refracting sunlight during the daytime. The second step is to build solar night lights by adding a micro ...