Concave lens is also known as

Options

A. converging lens
B. diverging lens
C. dual lens
D. None of the above

Explanation

To solve the question "Concave lens is also known as," we will analyze the properties of a concave lens and its classification.

### Step-by-Step Solution:

1. **Understanding the Lens Types**:
- There are two main types of lenses: convex (converging) lenses and concave (diverging) lenses.

2. **Identifying the Concave Lens**:
- A concave lens is thinner at the center than at the edges. It diverges light rays that are incident on it.

3. **Behavior of Light Rays**:
- When parallel rays of light pass through a concave lens, they do not converge; instead, they spread out or diverge.

4. **Terminology**:
- Since a concave lens causes light rays to diverge, it is classified as a "diverging lens."

5. **Selecting the Correct Answer**:
- Given the options:
- A) Converging lens
- B) Diverging lens
- C) Dual lens
- D) None of the above
- The correct answer is option B, "Diverging lens," because it accurately describes the behavior of light through a concave lens.

### Final Answer:
Concave lens is also known as **Diverging lens**.

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