What is the missing word?
Bodies which do not emit any light are called ______bodies.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the missing word in the statement "Bodies which do not emit any light are called ______ bodies."

2. **Identifying Key Terms**: We need to focus on the term "bodies which do not emit any light." This indicates that we are looking for a specific category of objects.

3. **Defining Luminous and Non-Luminous Bodies**:
- Luminous bodies are those that emit their own light. Examples include the Sun and stars.
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