Question

a concave mirror produces a three times magnified real image of an object placed at 10cm in front of it.where is the image located?

Answer 1

a concave mirror produces a three times magnified real image of an object placed at 10cm in front of it. where is the image located?

Solution:

m = 3 - Magnification of the concave mirror;

d = -10cm - object distance (since it is a concave mirror, object distance will be negative)

f - image distance.

Formula for magnification:

$$m = \frac {A ^ {\prime} B ^ {\prime}}{A B} = \frac {- f}{d}$$ $$f = - m \cdot d = - 3 \cdot (- 10 \mathrm{cm}) = 30 \mathrm{cm}$$

Answer: image distance will be at 30cm at the back of the mirror, above the principle axis (because the value is positive).