Image formed by a convex ______is always virtual and smaller in size.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks to fill in the blank regarding the type of mirror that always forms a virtual and smaller image.

2. **Identifying the Type of Mirror**: We need to recall the characteristics of different types of mirrors. The two main types are concave mirrors and convex mirrors.

3. **Characteristics of Convex Mirrors**:
- Convex mirrors are curved outward.
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