A camera is an optical instrument which makes use of a

Options

A. convex lens
B. concave lens
C. cylindrical lens
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what type of optical element a camera uses. It provides three options: convex lens, concave lens, or cylindrical lens.

2. **Analyzing the Function of a Camera**: A camera is designed to capture images, similar to how the human eye works. The human eye uses a convex lens to focus light onto the retina.

3. **Identifying the Lens in a Camera**: Just like the human eye, a camera also uses a lens to focus light. The lens in a camera is typically a convex lens, which converges light rays to form a clear image.

4. **Comparing with the Human Eye**: In the human eye, the convex lens is responsible for focusing light onto the retina. In a camera, the convex lens focuses light onto a screen or film, where the image is formed.

5. **Conclusion**: Since both the human eye and the camera use a convex lens for image formation, we can conclude that the correct answer to the question is "convex lens".

**Final Answer**: A camera is an optical instrument which makes use of a convex lens.

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