Advertisements
Advertisements
प्रश्न
Explain the following term related to spherical lenses:- centres of curvature
उत्तर
Centre of Curvature:-
The centre of sphere of part of which a lens is formed is called the centre of curvature of the lens. Since concave and convex lenses are formed by the combination of two parts of spheres, therefore they have two centres of curvature. One centre of curvature is usually denoted by C1 and second is denoted by C2.
APPEARS IN
संबंधित प्रश्न
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
Why is a hole burnt in the carbon paper?
Name the spherical mirror which can produce a real and diminished image of an object.
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
Name the two kinds of spherical mirrors and distinguish between them.
Name the kind of mirror used to obtain :
A real and enlarged image
Select the correct option:
A mirror forms a virtual image (diminished) of an object, whatever be the position of object:
Define the term Principal axis.
The spherical mirror with a reflecting surface curved inward is called
