Advertisements
Advertisements
प्रश्न
How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?
उत्तर
The magnification produced by a lens = v/u
APPEARS IN
संबंधित प्रश्न
The following diagram shows an object AB and a converging lens L with foci F1 and F2. Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.
A lens forms an erect, magnified, and virtual image of an object. Name the device which uses this principle.
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.
The maximum magnifying power of a convex lens of focal length 5 cm can be ______.
Name the lens for which magnification is always less than 1.
Draw a neat diagram to explain the action of a convergent (convex) lens as a reading glass (or magnifying glass). State the characteristics of the image formed.
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
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.
State two uses of magnifying glass.