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...
by Rajan Gupta | Aug 25, 2020 | Refraction
We will now discuss the formation of different types of images by a convex lens when the object is placed 1. At infinity 2. Beyond 2F 3. At 2F 4. Between F and 2F 5. At the focus F 6. Between the focus F and optical centre C 1. Image formed by a convex lens when...
by Rajan Gupta | Aug 25, 2020 | Refraction
Following are the rules which are used for obtaining the images formed by spherical lenses. A ray of light from the object parallel to the principal axis of a lens passes through the principal focus (of a convex lens) or appears to pass through the principal focus (of...
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