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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Size of object ho =7cm
Size of the object ho =?
Focal length f=−15cm
Object distance u=−25cm
Image distance v=?
Using mirror formula,=+
=+
v=−37.5cm
Hence, position of image at 37.5cm infront of the mirror.
hi =−1.5×hO
hi =−1.5×7=−10.5cm
Hence,size of image is −10.5cm.
Nature of image is real,inverted and magnified.
Hope it helps :)
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