please solve this question
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Dear Friend,
concave lens
f=-20cm
we have to find a distance between object and mirror such that magnification is double.
so,m=2
-v/u=2
u=-v/2
1/f=1/v+1/u
-1/20=1/v+-2/v
-1/20=-1/v
v=20cm
u=-20/2=-10cm
so, answer is -10 cm
hope it benefits u.
concave lens
f=-20cm
we have to find a distance between object and mirror such that magnification is double.
so,m=2
-v/u=2
u=-v/2
1/f=1/v+1/u
-1/20=1/v+-2/v
-1/20=-1/v
v=20cm
u=-20/2=-10cm
so, answer is -10 cm
hope it benefits u.
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