Question

d) 16
5.
the le
Passage:
Object - A is at a distance 2f from a positive lens of focal length f, and Object - B is at 1/2 from the lens.
On the other side of the lens there is a flat mirror lying parallel to and coincide with the optical axis of the
lens. Find the positions of the final images and the magnifications of the two objects. Also determine
whether the images are real or virtual, and answer the following.
A А
B
B
Mimor
B
í
1
1
Location of the image of an object A and its nature
a) Forms at 2F and real
b) Forms at f' and virtual
c) Forms at 2f and virtual
d) Forms at 'f' and real
Magnification of an object 'A' is
b)+1
c)-2
d) - 1
Image of the object B formed and it's nature is
a) Forms at fand real
b) Forms at 2f and virtual
c) Forms at 2f and real
d) Forms at 'f' and virtual
Magnification of an object 'B' is
a) +1
b) - 1
c) + 2
d) - 2
​

Answer 1

Answer:

ANSWER

For a concave mirror, when object is at 2f. image is formed at 2f.

Hence, v

1

=−2f for concave mirror

Image formed by concave mirror serves as an object to plane mirror.

Position of plane mirror with respect to concave mirror is d=−f

Hence, position of object for plane mirror is, u

2

=−f, (origin shifted to left)

Hence, position of image for plane mirror is, v

2

=+f

Position of final image wrt the concave mirror is v

3

=v

2

+d=0, (origin shifted to right)

solution