Science, asked by shivam568, 1 year ago

at what distance from a concave mirror of focal length 10cm should an object 2cm long be placed in order to get an erect image 6cm tall

Answers

Answered by vivisivaavcce
8
Since it is a concave mirror,f=10cm
height of object=2 cm
height of image =6 cm. we are required to find image distance,u.
magnification,m=height of image÷height of object
                         = 6/2=3
m=f÷f-u(from mirror formula and magnification formula..
 3=10÷10-u
3(10-u)=10
30-3u=10
-3u=10-30
-3u=-20
-u=-20/3cm
u=20/3 cm..
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