Advertisements
Advertisements
प्रश्न
Why is the focal length of the lens, used as a magnifying glass, kept short?
Advertisements
उत्तर
The focal length of the lens used as a magnifying glass is kept small to increase its magnifying power.
संबंधित प्रश्न
A lens forms an erect, magnified and virtual image of an object.Draw a ray diagram to show the formation of image.
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
What information about the nature of image is real or virtual, do you get from the sign of magnification + or -?
The magnification by a lens is -3. Name the lens and state how are u and v related?
The magnification by a lens is +0.5. Name the lens and state how are u and v related?
The maximum magnifying power of a convex lens of focal length 5 cm can be ______.
Name the lens for which magnification can be 1. For what position of the object will the magnification be 1?
An erect, magnified, and a virtual image is formed when an object is placed between the optical centre and principal focus of a lens.
(i) Name the lens.
(ii) Draw a ray diagram to show the formation of the image with the above-stated characteristics.
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.
Write an expression for the magnifying power of a simple microscope. How can it be increased?
