Question

Lens making formula in optics?

Answer 1

Hippo videos optical instrument lenses of different focal length are used focal length of a lens depend upon Reddy of resistance of two surfaces and refraction index of the lens material Lens Maker Formula used by lens manufacturer of for making length of desired focal length .

Answer 2

Lensmaker's equation. The focal length of a lens in air can be calculated from the lensmaker's equation: is the thickness of the lens (the distance along the lens axis between the two surface vertices). The focal length f is positive for converging lenses, and negative for diverging lenses.