Answers

The Brainliest Answer!
2015-11-29T16:55:01+05:30
Object distance (u)=60cm
magnification(m)=1/2
m=  -v/u
∴1/2= -v/60
∴-v = 30
∴ v= -30 cm
now m= 1/3
v = -30 cm
∴m= -v/u
∴ 1/3 = -(-30)/u
∴u= 90cm    ans











1 5 1
2015-11-29T17:08:11+05:30
Concave mirror magnifies 1/2 when the object is
60cm away. 60-----1/2 x-------1/3 60*1/2=1/3x 30=1/3x 30*3=x 90cm=x
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