Here's a breakdown:
* Light: Electromagnetic radiation that our eyes can see.
* Pass Through: When light hits an object, it can be absorbed, reflected, or transmitted (passed through).
* Opaque: Objects that primarily absorb or reflect light, not allowing it to pass through.
Examples of opaque objects:
* Walls: Made of materials like brick, wood, or concrete that block light.
* Books: Paper and ink absorb most light.
* Humans: Our skin, bones, and internal organs absorb and reflect light.
* Rocks: Solid and dense, preventing light from passing through.
Important Note: The term "opaque" is relative. Some materials might be opaque to certain wavelengths of light but transparent to others. For instance, a window pane is opaque to ultraviolet light but transparent to visible light.