Question

A convex lens has a focal length of 30 cm. Where should an object be placed in front of this convex lens so as to obtain an image which is real, inverted and same size as the object? *

30 cm

60 cm

40 cm

80 cm​

Answer 1

Answer:

60cm

Explanation:

at centre image is real, inverted and same size as the object

so,

c=2f=2×30=60cm