Advertisements
Advertisements
प्रश्न
Define magnification produced by a lens. State its unit.
Advertisements
उत्तर
The magnification produced by a lens is defined as the ratio of the size of the image to the size of the object, i.e.,
Magnification (m) = `"Size of the image"/"Size of the object"`
It has no unit.
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.

Ray diagram for the formation of image by a magnifying glass.

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 maximum magnifying power of a convex lens of focal length 5 cm can be ______.
What are conjugate foci?
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.
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.
An object AB is placed between 2F1 and F1 on the principal axis of a convex lens as shown in the diagram. Copy the diagram and using three rays starting from point A, obtain the image of the object formed by the lens.

State two uses of magnifying glass.
