Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:
a CD

Explanation

To classify a CD as opaque or transparent, and luminous or non-luminous, we can follow these steps:

### Step-by-step Solution:

1. **Understanding Opaque, Transparent, and Translucent:**
- Opaque objects do not allow light to pass through them.
- Transparent objects allow light to pass through without scattering.
- Translucent objects allow some light to pass through but scatter it, making objects behind them appear blurry.
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