What is a lens definition for kids?
Kids Definition of lens 1 : a clear curved piece of material (as glass) used to bend the rays of light to form an image. 2 : a clear part of the eye behind the pupil and iris that focuses rays of light on the retina to form clear images.
WHAT IS lens formula and its magnification?
The lens maker’s equation is 1f=1v−1u. The magnification produced by a lens is defined as the ratio of the height of the image to the height of the object. m=hiho. The magnification produced by a lens is defined as the ratio of the image distance to the object distance.
WHAT IS lens short answer?
A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.
WHAT IS lens answer?
a lens is a piece of glass or other hard clear material molded with one side flat and the other curved or both sides curved that forms an image by bringing together or spreading the light that passes through it. An example of lens is the clear pieces covering the eyes in eye glasses.
What is imaging equation?
Object range and image range are related by the imaging focal length.The formulae on lens extension, tube length, sensor to object distance OO’ and focal length are derived from the imaging equation: \frac{1}{a}+\frac{1}{a’}=\frac{1}{f}
WHAT IS lens formula used for?
The lens equation can be used to calculate the image distance for either real or virtual images and for either positive on negative lenses. The linear magnification relationship allows you to predict the size of the image.
HOW IS lens power calculated?
The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. Lens surface power can be found with the index of refraction and radius of curvature.
WHAT IS lens Mcq?
Explanation: A lens is an image- forming device. They form an image by refraction of light at its two bounding surfaces. 2.
WHAT IS lens in human eye?
lens, in anatomy, a nearly transparent biconvex structure suspended behind the iris of the eye, the sole function of which is to focus light rays onto the retina. Cataracts that interfere with vision can be corrected by surgery, during which the clouded lens is removed and replaced with an artificial lens.