Converging (or convex) lens

Definition

A converging (or convex) lens is a lens that causes parallel rays of light to converge at a single point called the focal point. It is thicker in the middle than at the edges.

5 Must Know Facts For Your Next Test

1. The principal axis is an imaginary line passing through the center of the lens and perpendicular to its surface.
2. The focal length is the distance between the center of the lens and its focal point.
3. Converging lenses can form real or virtual images depending on the object's position relative to the focal length.
4. The lens formula $\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}$ relates object distance ($d_o$), image distance ($d_i$), and focal length ($f$).
5. Magnification ($M = \frac{h_i}{h_o} = -\frac{d_i}{d_o}$) describes how much larger or smaller an image is compared to the object.

Related terms

Focal Point:

The point at which parallel rays of light converge after passing through a lens.

Lens Formula: $\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}$, where $f$ is the focal length, $d_o$ is the object distance, and $d_i$ is the image distance.

Magnification:

$M = \frac{h_i}{h_o} = -\frac{d_i}{d_o}$, where $M$ is magnification, $h_i$ is image height, $h_o$ is object height, $d_i$ is image distance, and $d_o$ is object distance.