Opaque materials are substances that do not allow light to pass through them. When light strikes an opaque material, it either gets absorbed or reflected, but you cannot see through it. For example, wood, stone, and metal are opaque materials. ...

Transparent materials are substances that allow light to pass through them easily, so you can see objects clearly through them. For example, glass and water are transparent materials. When you look through a transparent material, the image on the other ...

No, not all shiny materials are metals. While metals like gold, silver, and iron are known for their shiny appearance, other non-metal materials can also be shiny. For example, glass and some plastics can be shiny depending on how they ...

Lustre refers to the way light reflects off the surface of a material, giving it a shiny appearance. Materials with a high lustre, like metals (e.g., gold or silver), look shiny and glossy. On the other hand, materials with low ...

An example of classification based on hardness is the division of materials into hard and soft categories. For example, diamond is a very hard material, often used in cutting tools, while rubber is a soft material, used for making flexible ...