Fill in the following blanks with suitable words :
In image formation, convex lens is very similar to_________ mirror whereas concave lens is very similar to___________mirror.

Answer

To fill in the blanks in the question, we need to identify the similarities between lenses and mirrors based on their image formation properties.

1. **Understanding the Convex Lens**:
- A convex lens converges light rays to form images.
- When an object is placed at the center of curvature (C), the image formed is real, inverted, and of the same size.
- When the object is placed at the focus (F), the image is formed at infinity.

2. **Finding the Similar Mirror for Convex Lens**:
- The concave mirror behaves similarly to the convex lens.
- When an object is at the center of curvature of a concave mirror, the image formed is also real, inverted, and of the same size.
- When the object is at the focus of the concave mirror, the image is formed at infinity, just like in the convex lens.

3. **Understanding the Concave Lens**:
- A concave lens diverges light rays to form images.
- When an object is placed at infinity, the image is formed at the focus (F) of the lens.

4. **Finding the Similar Mirror for Concave Lens**:
- The convex mirror behaves similarly to the concave lens.
- When an object is at infinity in front of a convex mirror, the image is formed at the focus, which is virtual and upright.

5. **Filling in the Blanks**:
- Therefore, we can fill in the blanks as follows:
- In image formation, convex lens is very similar to **concave** mirror whereas concave lens is very similar to **convex** mirror.

### Final Answer:
In image formation, convex lens is very similar to **concave** mirror whereas concave lens is very similar to **convex** mirror.

---