lensmaker's equation

The lensmaker's equation helps us understand how a lens bends light to form clear images. It relates the lens’s focal length (how strongly it converges or diverges light), the shape and curvature of its surfaces, and the material's ability to bend light (refractive index). Essentially, it shows that changing the curvature of the lens surfaces or using different materials affects how the lens focuses light. This understanding is crucial for designing eyeglasses, cameras, and microscopes to ensure they produce sharp images by properly controlling how light rays converge or diverge.