What is the formula of areal …

Linear Magnification = Height of the image / Height of the object =  -v/u

Areal Magnification = v² / u²

^{Other imp formulas:}

Snells law sin i / sin r = constant = Refractive index between two given medium

Refractive index of a medium, μ = c/v where c is the speed of light in vacuum and v is the speed in light in the medium

Lens Formula 1/f = 1/v – 1/u where, f = focal length of the lens, u = distance of object, v = distance of image.

Lens Maker’s formula 1/f=(μ – 1) (1/R1 – 1/R2) where, μ = refractive index of the material of the lens and R1 and R2 are radii of curvature of the lens

Two lenses are in contact with each other, then P = P₁ + P₂ where P, P₁, P₂ are the power of combination, power of lens 1 and power of lens 2 respectively.

Two lenses are separated by a distance d, then P = P₁ + P₂ –d P₁ P₂