Question

A concave mirror produces three times magnified(enlarged) real image of object placed at 10 cm in front of it . Where is the image located?

Answer 1

m= 3
Acc. old sign convention

u= -10cm
v=?

3=v/u
3×-10cm= v
v= -30cm

Answer 2

Hey Soul ❤

Your Answer :

Magnification produced by a spherical mirror :

m = Height of the image/Height of the object

= Image Distance/Object Distance

m = h'' / h' = - ( v / u )

Let the height of the object, h' = h

Then, height of the image, h'' = -3h

( here image distance is in minus so it should be real )

now,

-3h/h = - v/u

v/u = 3

Object distance (u)= - 10 cm { Given }

v = 3 × ( - 10 ) = - 30 cm

Therefore, the negative sign indicates that an inverted image is formed in front of the given concave mirror at a distance of 30 cm.

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