How do you calculate the radius of curvature of a lens?
Analytically, the focal length is described by the lens maker’s equation: 1/f = (n – 1)(1/R1 + 1/R2), where R1 and R2 are the radii of curvature, f is the focal length, and n is the index of refraction. Verify that your earlier measurements are consistent with this equation.
What is the formula of plano convex lens?
f=R/2.
What is radius of curvature of eye?
The cornea has an average radius of curvature of 7.80 mm with an instrument calibrated for index of refraction of 1.3375.
What is the focal length of concave mirror?
Focal Length – The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a ‘Real image’ of a distant object at its focus, as shown in the figure.
What is the formula of spherical mirror?
Suppose an object is placed u cm in front of a spherical mirror of focal length f such that the image is formed v cm from the mirror, then u, v and f are related by the equation; 1/f= 1/u + 1/v. This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.
What is the radius of curvature of double convex lens?
The radii of curvature of the surfaces of a double convex lens are 20 cm and 40 cm respectively, and its focal length is 20 cm.