Question

If Power of lens is - 4D, write the
name of the lens. If an object is kept at
80 cm far from this lens on the
principal axis, write position and
nature of image produced by it.
​

Answer 1

Answer:

convex lens as power is negative ..

focal length of this lens is -100/4 = 25 cm

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

so putting the values we get v = - 19 .04 cm