Question

> An obiect of 6 cm is placed at 50cm in front of Convex
mirrors of focal length 30cm. Find the distance of
the image magnification and height of the
of the image?
​

Answer 1

Explanation:

As shown in figure, the plane mirror will form erect and virtual image of same size at a distance of 30 cm behind it. So, the distance of image formed by plane mirror from convex mirror will be

PI=MI−MP

But as, MI=MO

PI=MO−MP=30−20=10 cm

Now, as this image coincides with the image formed by convex mirror, therefore for convex mirror,

u=−50 cm;v=+10 cm

So,

+10

1

+

−50

1

=

f

1

, i.e., f=

4

50

=12.5 cm

So, R=2f=2×12.5=25 cm.

Answer 2

Archita is right and anyway good morning