Question

where should an object should be placed so that a real and inverted image of same size is obtained by a convex lens of focal length 10cm.
a) 10cm
b) Infinity
c) 20cm
d) 15cm​

Answer 1

Explanation:

It is given that F1 =10cm

We know that real and invented image of the same size is formed in 2F2

2F1=2×10=20 cm