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प्रश्न
Define magnifying power of a simple microscope. How can it be increased?
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उत्तर
The magnifying power of the microscope is defined as the ratio of the angle subtended by the image at the eye to the angle subtended by the object (assumed to be placed at the least distance of distinct vision D = 25 cm) at the eye, i.e.,
Magnifying power = 1 + `D/F`
Where F is the focal length of the lens.
The magnifying power of a microscope can be increased by using the lens of short focal length. But it cannot be increased indefinitely.
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.
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.
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?
The magnification by a lens is -3. Name the lens and state how are u and v related?
What information we seek by the linear magnification of the image when it is positive or negative?
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?
Copy and complete the following ray diagram.
State two uses of magnifying glass.
