Advertisements
Advertisements
प्रश्न
Name the lens used as a magnifying glass.
Advertisements
उत्तर
Convex (or converging) lens is used as a magnifying glass.
संबंधित प्रश्न
The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5
The following diagram shows an object AB and a converging lens L with foci F1 and F2 State three characteristics of the image in relation to the object.

What is a magnifying glass?
What information about the nature of image is real or virtual, do you get from the sign of magnification + or -?
An object is placed at a distance of 20 cm in front of a concave lens of focal length 20 cm. find: the magnification of image.
Define the term magnifying power of a simple microscope. How does it depend on the focal length of the lens used?
Name the lens for which magnification can be 1. For what position of the object will the magnification be 1?
Show with the help of a ray diagram, the path of the ray when incident normally on the first surface of the glass block, through the block and the liquid.
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.
Write an expression for the magnifying power of a simple microscope. How can it be increased?
