by Rajan Gupta | Aug 25, 2020 | Refraction
The power of a lens is defined as the ability of the lens to converge or diverge a beam of light falling on it. A lens is said to be of greater power if it diverges or converges a beam of light more strongly by focusing them closer to the optical centre. In other...
by Rajan Gupta | Aug 25, 2020 | Refraction
The magnification of a lens may be defined as the ratio of the size (height) of the image to the size (height) of the object. The magnification of a lens is represented by the letter ‘m’. Thus, m = or m = Where, h2 = size of...
by Rajan Gupta | Aug 25, 2020 | Refraction
A lens formula may be defined as the formula which gives the relationship between the distance of image (v), distance of object (u), and the focal length (f) of the lens. It may be written as: Where, v = Distance of image from optical centre of...
by Rajan Gupta | Aug 25, 2020 | Refraction
For measuring the various distances in a ray diagram of refraction by spherical lenses following sign conventions are used: All the distances in a ray diagram of refraction by spherical lenses are measured from the optical centre of the spherical lens. The distances...
by Rajan Gupta | Aug 25, 2020 | Refraction
As a convex lens forms different types of images depending on the position of object, similarly a concave lens also forms different types of images when the object is placed at 1. At infinity 2. Between infinity and optical centre 1. Formation of image by a...
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