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प्रश्न
A lens forms an erect, magnified and virtual image of an object.Draw a ray diagram to show the formation of image.
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उत्तर
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.
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
Define magnifying power of a simple microscope. How can it be increased?
Ray diagram for the formation of image by a magnifying glass.
The focal length of a convex lens is 25 cm. At what distance from the optical centre of the lens an object be placed to obtain a virtual image of twice the size?
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.
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.
Why is the focal length of the lens, used as a magnifying glass, kept short?
What information we seek by the linear magnification of the image when it is positive or negative?
Name the lens for which magnification is always less than 1.
