Notifications
Clear all
0
19/09/2020 6:46 pm
Topic starter
A point-like object is placed at distance of 1 m in front of a convex lens of focal length 0.5 m. A plane mirror is placed at a distance of 2 m behind the lens. The position and nature of the image formed by the system is :
(1) 2.6 m from the mirror, real
(2) 1 m from the mirror, virtual
(3) 1 m from the mirror, real
(4) 2.6 m from the mirror, virtual
1 Answer
0
19/09/2020 6:48 pm
(4) 2.6 m from the mirror, virtual
Explanation:
For I1 applying lens formula
1/v1 - 1/-1 = 1/0.5
v1 = 1
For I2 applying condition of plane mirror
For final image (I3) again applying lens formula
1/v3 - 1/-3 = 1/0.5
v2 = 3/5
The distance of final image from mirror
D = 3/5 + 3
D = 2.6
The image will be real (but it is given virtual in answer).
This post was modified 4 years ago by nikhil04