SUMMARY
The focal length of a convex lens can be determined using the thin lens equation: 1/f = 1/p + 1/q. In this scenario, the object distance (p) is 5 cm, and the total distance between the object and the screen is 20 cm, which means the image distance (q) is 15 cm. Substituting these values into the equation yields a focal length (f) of 3.75 cm. This calculation confirms that the lens effectively produces a sharp image on the screen.
PREREQUISITES
- Understanding of the thin lens equation
- Knowledge of object and image distances in optics
- Familiarity with convex lens properties
- Basic algebra for solving equations
NEXT STEPS
- Study the derivation of the thin lens equation
- Learn about the characteristics of convex lenses
- Explore practical applications of lens formulas in optical devices
- Investigate the impact of lens curvature on focal length
USEFUL FOR
Students studying optics, physics educators, and anyone interested in understanding lens behavior and image formation.