What is opaquetransparent and translucent?

Answer 1

They are all words describing how well light travels through a substance or, in other words, how well you can see through it.

Opaque means that you can't see through it. Eg a rock is opaque

Translucent means that you can kind of see through it. Some light gets through but you can't see clearly through it. Think frosted glass.

Transparent means that it's see through.

Answer 2

Opaque materials do not allow light to pass through, blocking the view of objects behind them. Transparent materials allow light to pass through easily, enabling clear viewing of objects. Translucent materials partially transmit light but scatter it in a way that objects on the other side are not clearly visible.