Focal Length of Concave Lens given Image and Object Distance Calculator

Calculate Focal Length of Concave Lens





Formula

The formula to calculate the Focal Length of Concave Lens is:

\[ f_{\text{concave lens}} = \frac{u \cdot v}{v + u} \]

Where:

Definition

Focal Length of Concave Lens is the distance between the center of the lens and the focal point, which is the point where parallel rays of light converge after passing through the lens.

Example Calculation

Let's assume the following values:

Using the formula:

\[ f_{\text{concave lens}} = \frac{0.9 \cdot 0.27}{0.27 + 0.9} \]

Evaluating:

\[ f_{\text{concave lens}} = 0.207692307692308 \text{ m} \]

The Focal Length of Concave Lens is 0.207692307692308 m.

Conversion Chart

Object Distance (m) Image Distance (m) Focal Length of Concave Lens (m)
0.8 0.27 0.201869158879
0.9 0.27 0.207692307692
1 0.27 0.212598425197