The term magnification means a comparison between the size of the image formed by a lens with respect to the size of the object. For a lens: Magnification 'm' is the ratio of the height of the image to the height of the object.
: [tex] \implies[/tex] The magnification produced by spherical mirror is given by the ratio of size of a image and the size of an object.
magnification = size of a image / size of an object
m = h' / h = - v / u
Where V is the object distance from the lens.
U is the object distance from the lens.
NOTE : m is - ve for real image but +ve for virtual image
hence, magnification for convex mirror is always +ve while for concave mirror it depends upon the nature of the image.
Remember, sign may vary with different mirrors and lenses.
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The Value of Magnification describes the Property of Image. Where | m | > 1 means enlarged and
| m | < 1 means smaller than the object.
The sign denotes the property of the same side or on the opposite side of the lens
The S.I. unit of magnification is determined based on the magnification formula for lenses and mirrors. In both cases, magnification is determined based on a ratio of the same units, i.e.
The ratio of image distance to the object distance and the ratio of the height of the image to the height of the object. That is why magnification has no dimension. It is a dimensionless parameter and has no units.
The concept of magnification deals with the enlargement of the size of an object in the form of an image, with the help of lenses and mirrors. The strength of magnification is determined by the power of magnification. Magnification is a dimensionless parameter but the power of magnification is measured by a unit called dioptre.
In real-life situations, there are many necessary areas where the magnified size of the object is examined. For example, binoculars are used for objects which are kept away from the lens. Microscopes are also used to examine tiny details of objects in laboratories
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The term magnification means a comparison between the size of the image formed by a lens with respect to the size of the object. For a lens: Magnification 'm' is the ratio of the height of the image to the height of the object.
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: [tex] \implies[/tex] The magnification produced by spherical mirror is given by the ratio of size of a image and the size of an object.
magnification = size of a image / size of an object
m = h' / h = - v / u
Where V is the object distance from the lens.
U is the object distance from the lens.
NOTE : m is - ve for real image but + ve for virtual image
hence, magnification for convex mirror is always +ve while for concave mirror it depends upon the nature of the image.
Remember, sign may vary with different mirrors and lenses.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
★ More to know :