Question

n object is placed at 30 cm in front of a concave lens of focal length 15 cm. At what

distance from the mirror should a screen be placed, so that a sharp image can be obtained?

Find the magnification of image.​

Answer 1

Answer:

by lens formula 1/f = 1/v - 1/u

here f is focal length

v is image distance

u is object distance

substituting the values from the question

1/15 = 1/n - 1/30

1/n = 1/15 + 1/30