Answer:
(a)The formation of image with and
withoutthe placement of a convex lens shown, I? represents a virtual object
with real image at I?.
Using
or
or
i.e. image
is formed 7-5 cm away from thelens and it is a real image.
(b For a concave
lens, the image formationis as shown.
Using
oror v
= 48 cm
i.e. the image
formed is at a distance of 48cm from the lens and it is a real image.
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