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प्रश्न
What information about the nature of image is real or virtual, do you get from the sign of magnification + or -?
उत्तर
A positive sign of magnification indicates that the image is virtual, while a negative sign indicates that the image is real.
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संबंधित प्रश्न
Define magnifying power of a simple microscope. How can it be increased?
A magnifying glass forms ______.
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?
The magnification by a lens is -3. Name the lens and state how are u and v related?
What are conjugate foci?
Define magnification produced by a lens. State its unit.
How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?
An object is placed in front of a lens between its optical centre and the focus and forms a virtual, erect, and diminished image. Draw a ray diagram to show the formation of the image with the above-stated characteristics.
(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?
