Question

Where should a slide be placed in front of a projector
Jens so as to obtain a real image on a screen whose
linear magnification is 20. Given that focal length of the
lens is 10 cm.
9. An object is placed at 60 cm from a concave lens of focal
length 12 cm. At what distance from the lens its image
is formed? What is its magnification?
10. Which of the two lenses has a greater power?
(a) a convex lens of focal length 5 cm, and
(b) a convex lens of focal length 50 cm.
Justify you are​

Answer 1

Answer:

Explanation:

30cm.

Your questions are irritating

Answer 2

Answer:

9 question : 10 cm 1/6

Explanation:

u = -60cm

f =-12

1/v -1/u =1/f

1/v = 1/-60 + 1/-12

= -1-5/60

= -6/60

= 10

m = - v/u

= -10/-60

= 1/6