Question

Object distance and image distance of a lens are - 30 cm and -

10 cm respectively. Find the magnification and decide the type

of lens used and nature of the image.​

Answer 1

Answer:

u = -40

v= -10 according to lens formula

1/f= 1/v -1/u

so this formula will give the focals length f=-15cm

by magnification formula we'll get m=-1/3

lens is concave lens and image is real and inverted