An optically opaque body casts a _______.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Optically Opaque Body":**
- An optically opaque body is defined as a material that does not allow light to pass through it. This means that no light can be transmitted through the body.

2. **Examples of Optically Opaque Bodies:**
- Common examples of optically opaque bodies include materials like wood, metal, and walls. These materials block light completely.

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