The beam should be straight in the top and bottom segments, and bend down in the middle. In a gradient, light bends towards the higher-index part, as the law of refraction predicts, or according to ...

The change in direction of a beam of light as it travels from one material to another is called refraction. The normal is a construction line drawn at right angles to the surface of the glass block.

Introduces the concept of light through the character Ray, a personification of light beams. Ray explains the origins of light, its crucial role in visibility, and how it interacts with various ...

Tesla is rolling out a big software update to its cars this spring, which finally enables adaptive high-beam headlights on ...