How to Calculate Magnification with a Magnifying Glass

What is the formula to calculate magnification with a magnifying glass?

Given a 2.1 cm-focal length magnifying glass and the distance of the near point (typically 25 cm), how can we determine the magnification?

Calculation of Magnification:

To calculate magnification with a magnifying glass, we use the formula: M = 1 + (D/f), where M is the magnification, D is the distance of the near point, and f is the focal length of the lens.

When determining the magnification of an object using a magnifying glass, it is essential to understand the relationship between the focal length of the lens, the distance of the near point, and the resulting magnification.

In this specific scenario, with a 2.1 cm-focal length magnifying glass, the formula becomes: M = 1 + (25 cm / 2.1 cm).

By solving for the magnification, we find that the magnifying glass should be held approximately at its focal length from the object to achieve a magnification of 10x.