How do you tell if a lens is concave or convex?
A concave lens is thinner in the middle and thicker at the edges. A convex lens is thicker in the middle and thinner at the edges. Used in the camera, focus sunlight, overhead projector, projector microscope, simple telescope, magnifying glasses, etc. It is also used for the correction of the problem in long sight.
What is concave lens with diagram?
Case 2 – Object is between Infinity and Optical Center
| Position of the object | Position of the image | Nature of the image |
|---|---|---|
| At infinity | At focus F 1 | Virtual and erect |
| Between infinity and optical centre O of the lens | Between focus F 1 and optical centre O | Virtual and erect |
What is V and U in Lens formula?
where u is the distance of the object from the lens; v is the distance of the image from the lens and f is the focal length, i.e., the distance of the focus from the lens. N.B. other sign conventions are sometimes used in the literature. = 2 6 − 1 6 = 1 6 So v = 6 cm.
What is 1 U 1 V 1 F?
The formula is a relation between the object distance u , inmage distance v and the focal length from the pole of the concave mirror. The formula is valid for the images in convex mirror and even for the images in lens.
What is the difference between the mirror formula and lens formula?
When an object is placed at a distance u = 2f from the optical center of the lens, the image formed by the convex lens will be the same size as that of the object….Difference Between Lens and Mirror.
| Lens | Mirror |
|---|---|
| Image formation for the object placed at F Concave lens Convex lens | Image formation for the object placed at F |
What is the formula of concave 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 difference between mirror and lens?
The mirror is glass with one side silvery backing produces an image by reflection on only one surface. The lens is a transparent substance that produces images by refraction in any surface of the two surfaces. It can be plane or curved.