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प्रश्न
What information we seek by the linear magnification of the image when it is positive or negative?
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उत्तर
If magnification is positive, then the image will be real and inverted, and if negative then the image will be virtual and erect.
संबंधित प्रश्न
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
Where is the object placed with respect to the principal focus of a magnifying glass, so as to see its enlarged image? Where is the image obtained?
What information about the nature of image is real or virtual, do you get from the sign of magnification + or -?
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.
The magnification by a lens is +0.5. Name the lens and state how are u and v related?
Define the term magnifying power of a simple microscope. How does it depend on the focal length of the lens used?
Will the image formed by a magnifying glass be real or virtual?
Define magnification produced by a lens. State its unit.
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
