A concave mirror has a focal length of 4 cm and an object 2 cm tall is placed 9 cm away from it. Find the nature, position and size of the image formed.
Distance of the object from the mirror 'u' = −9cm
Height of the object 'ho' = 2 cm
Focal length of the mirror 'f' = −4 cm
We have to find the distance of the image 'v' and height of the image 'hi'.
Using the mirror formula, we get
Therefore, distance of the image 'v' is 7.2 cm.
Now, using the magnification formula, we get
Thus, the height of the image 'hi' is 1.6 cm.
Again, using the magnification formula, we get
Thus, the image is real, inverted and small in size.
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