How to Use a Magnifying Glass to Create an Enlarged, Upright Image

What type of lens should be used when using a magnifying glass?

Is the image real or virtual?

If the focal length of the magnifying glass is 10m?

Answer:

To obtain an enlarged, upright image when using a magnifying glass, a converging lens, specifically a convex lens, should be used. The image formed is virtual.

When using a magnifying glass, you want to create an enlarged, upright image of the object being observed. To achieve this, a converging lens is used, typically a convex lens. Convex lenses are thicker in the center and thinner at the edges. They converge parallel rays of light to a focal point on the opposite side of the lens. This converging action results in an upright, virtual image that is larger than the actual object.

The image formed by the magnifying glass is virtual because the light rays do not actually converge to a single point; instead, they appear to diverge from a point behind the lens. This virtual image is what you see when looking through the magnifying glass, and it appears larger and upright, making it suitable for magnification purposes.

The focal length of the magnifying glass being 10 meters is quite unusual for practical use. Normally, magnifying glasses have very short focal lengths to create substantial magnification. A 10-meter focal length would result in a very weak magnifying effect. Therefore, it's likely that the focal length is much shorter in practical magnifying glasses.