Find out distance of object placed in front of concave mirror whose radius of curvature is 20cm and linear magnification is 2cm find out position of image.
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u = ? m = 2 cm
r = - 20 cm since , f = -10 cm
use
m = -v/u
2 = - v /u
v = -2u
1/f = 1/ v + 1/u
- 1/10 = - 1 /2u + 1/u
-1 /10 = -1 + 2 /2u
-1/10 = 1 / 2u
2u = -10
u = -5 ,cm
since
v = -2u
v = 10 cm
r = - 20 cm since , f = -10 cm
use
m = -v/u
2 = - v /u
v = -2u
1/f = 1/ v + 1/u
- 1/10 = - 1 /2u + 1/u
-1 /10 = -1 + 2 /2u
-1/10 = 1 / 2u
2u = -10
u = -5 ,cm
since
v = -2u
v = 10 cm
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