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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
The following diagram shows an object AB and a converging lens L with foci F1 and F2 State three characteristics of the image in relation to the object.
A lens forms an erect, magnified, and virtual image of an object. Where is the object placed in relation to the lens?
A lens forms an erect, magnified and virtual image of an object.Draw a ray diagram to show the formation of image.
A lens forms an erect, magnified, and virtual image of an object. Name the device which uses this principle.
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?
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
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?
Write an expression for the magnifying power of a simple microscope. How can it be increased?
