Question

a concave lens forms 2/3 size image that of the object .if focal length of the lens is 18 cm. find the object and image position .​

Answer 1

Answer:

u= 9 cm and v=6 cm

Step-by-step explanation:

v=2/3u

3/2u - 1/u =-1/18

3-2/u = -1/9

1/u=-1/9

u=-9 cm

v=-6 cm