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
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 kind of mirror used to obtain:
A virtual and enlarged image
Name the kind of mirror used to obtain:
A real and diminished image.
The erect image formed by a concave mirror is of size double the size of object. How are u and v related?
Define the term Principal axis.
Find the height of the image of a body of height 1.5m in a mirror with a magnification of 1.5.
In the following figure shows a concave mirror with its pole (P), focus (F) and centre of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Convex mirror
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
