Here's the breakdown:

* Medium: A substance that light can travel through.

* Types of Media:

* Transparent Media: Light passes through easily, allowing us to see clearly. Examples: air, glass, water.

* Translucent Media: Light passes through but is scattered, making objects appear blurry. Examples: frosted glass, thin paper.

* Opaque Media: Light cannot pass through at all. Examples: wood, metal, thick walls.

Let me know if you have any other questions!