Spectacular Lens Makers Formula For Convex Lens

Figure a shows the geometry of image formation by a double convex lens.

Lens makers formula for convex lens. The focal length of a lens depends on the refractive index of the lens and the radii of curvature. The focal length of each lens can be calculated using a simplified thick lens equation. Lens makers formula.

Let R 1 R 2 are the of curvature of the surfaces ABC ADC of the respectively. The image formation can be seen in two steps the first refracting surface form an image I 1 which act as a virtual object for the second surface. O Luminous point object on the principle axis.

The two foci F and F of a double convex or concave lens are equidistant from the optical centre. For a double convex lens the radius R1is positive since it is measured from the. R2 is the radius of curvature of sphere 2.

Consider two thin convex lenses L 1 and L 2 of focal length f 1 and F 2 placed coaxially in contact with each other. The ray of light from the object AB after refracting through the convex lens meets at. Consider a thin convex lens of focal length f RI n placed in air as shown in fig.

So focal length of a lens increases when it is immersed in water. Some scholars argue that the archeological evidence indicates that there was widespread use of lenses in antiquity spanning several millennia. Lenses of different focal lengths are used for different optical instruments.

Lens-Makers Formula For a thin lens the power is approximately the sum of the surface powers. Lens manufacturers use the lens makers formula to manufacture lenses of the desired focal length. Lens manufacturers commonly use the lens maker formula for manufacturing lenses of the desired focal length.