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science revision
| Term | Definition |
|---|---|
| light ray | A light ray is a straight line that shows the path along which light travels. Light rays help us understand how light moves and interacts with surfaces. |
| Angle of Incidence and Angle of Reflection | The angle of incidence is the angle between the incoming light ray and the normal. The angle of reflection is the angle between the reflected light ray and the normal. |
| reflection of light | Refraction is the bending of light as it passes from one material (medium) to another |
| Types of Materials & Light Transmission | Transparent: Lets light pass through clearly (e.g., clear glass). Translucent: Lets some light through, but not clearly (e.g., frosted glass, stained glass). Opaque: Does not let light through (e.g., wood, metal). |
| reflection of light | Light bounces off surfaces like mirrors, shiny objects, and water surfaces. |
| shadows | Shadows form when opaque objects block light rays. |
| lenses and images | Convex lens (also called a converging lens): Curves outward, brings light rays together (converges), can magnify and invert images. Concave lens (also called a diverging lens): Curves inward, spreads light rays apart (diverges), makes images smaller. |
| colour and light | White light is made of all colours of the spectrum: Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV). A filter lets through only some colours (e.g., a green filter only lets green light through). |
| everyday examples | Road mirrors, rearview mirrors use convex mirrors to give drivers a wider view. Solar furnaces and torches use concave mirrors to cover large distances. |
Created by:
peyton.wells
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