Question

8
For a convex lens, iſ real image is formed the
graph between (u + V) and u or v is as follows
UV
41
21
u orv
uv
4f
21
U or v
5
U+V
u or v
UV
41
2
u or y​

Answer 1

Answer:

For convex lens (for real image) u+v≤4f

For u=2f,v is also equal to 2f

Hence u+v=4f