An object of height 10 cm is placed 20 cm away from a convex mirror. The image is formed 25 cm away from the object. Find the height of the object
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Given :
In convex mirror,
Height of the object : 10 cm
Object distance : 20 cm
Image distance : 25 cm
To find :
The height of the object.
Solution :
we know that,
» The linear magnification produced by a mirror is equal to the ratio of the image distance to the object distance with a minus sign and it is equal to the ratio of image height and object height. that is,
where,
- h' denotes height of the image
- h denotes height of the object
- v denotes image distance
- u denotes object distance
By substituting all the given values in the formula,
Thus, the height of the image is 12.5 cm.
Answered by
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Answer:-
- Height of the object=h=10cm
- Object distance=-20cm=u
- Image distance=25cm=v
- Image height=h'=?
We know that
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