class 10
Defects of vision and their correction
The ability to see is called vision. It is also called eyesight. Sometimes the eye of a person cannot focus t…
The ability to see is called vision. It is also called eyesight. Sometimes the eye of a person cannot focus t…
An eye can focus the images of the distant objects as well as the nearby objects on its retina by changing th…
A convex lens converges the light rays falling on it whereas a concave lens diverges the light rays falling o…
New Cartesian sign convention is used for measuring the various distances in the Ray diagram of spherical len…
There are similar rules for constructive ray-diagrams for obtaining image with concave lenses. Rule 1. A ray …
The image is formed at that point where at least two refracted light rays meet ( or appear to meet ) . Rules …
The working of a lens is based on the refraction of light rays when they pass through it . A lens is a piece …