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प्रश्न
How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?
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उत्तर
The magnification produced by a lens = v/u
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.
An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance of 75 cm from the lens. Find:
- the focal length of the lens, and
- the magnification.
Define magnification produced by a lens. State its unit.
Name the lens for which magnification can be 1. For what position of the object will the magnification be 1?
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.
Copy and complete the following ray diagram.
(i) Draw a ray diagram to show how the lens can be used as a ‘magnifying glass’? State the nature of the lens.
(ii) In what respect does the image in (i) above different from the image formed by a concave lens?
State two uses of magnifying glass.
