Advertisements
Advertisements
Question
What are conjugate foci?
Advertisements
Solution
Two points lying on the principal axis such that the image of an object kept at such point is formed on the other point, are called conjugate foci.
RELATED QUESTIONS
Define magnifying power of a simple microscope. How can it be increased?
A magnifying glass forms ______.
Ray diagram for the formation of image by a magnifying glass.
The focal length of a convex lens is 25 cm. At what distance from the optical centre of the lens an object be placed to obtain a virtual image of twice the size?
The magnification by a lens is -3. Name the lens and state how are u and v related?
Name the lens used as a magnifying glass.
A convex lens produces on a screen an image twice the size of the object. If the position of image and object be interchanged, what will be the magnification then?
How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?
What is a magnifying glass (or a simple microscope)? Draw a ray diagram to show how a convex lens may be used as a magnifying glass. Where should the object be placed? State three characteristics of the image formed.
State two uses of magnifying glass.
