Question

the magnification of an image formed by a lens is -1.
if the distance of image from the optical centre of lens is
35cm, where is the object placed? what is
mature and focal length of lens?
if the object is
placed 20cm towards
the optical centre of lens,
where would image
be formed and what will be
it's mature ? Draw
a ray diagram to justify your answer.
​

Answer 1

Answer:

ANSWER

Focal length f=−20 cm

Object distance u=−50 cm

Using

v

1

Answer 2

Answer:

Object's distance: -35cm

Image's nature: Real, Inverted and Same size.

Focal length: 17.5cm

2nd part:

Image's distance: 140cm

Image's nature: Real, Inverted and Magnified.