Question

Analyse the following observation table showing variation of image distance (v) with object distance
(u) in case of a convex lens and answer the questions that follow, without doing any calculation: 5
S. Object distance Image distance
No. u (cm)
v (cm)
-90
+18
- 60
+ 20
+ 30
- 20
+ 60
- 30
+ 90
- 10
+ 100​

Answer 1

Answer:

When the object is placed between F and O

the characteristics of the images are on the same side, Virtual, Erect.

But in this case the focal length of the convex lens Is 15 CM and the last reading is not according to the above said characteristic image formation.

Here v value given is positive. This is not correct.