Find the power of a convex lens which formes a real and inverta
image of magnification - 1 of an
object placed at a distance of
20cm from its oftical centre.

Step-by-step explanation:

object distance, u =-20 cm

Magnification = -1

Magnification = v/u

-1 = v/ -20

or. v =20

By using thin lens formula,

1/v - 1/u = 1/f

1/20 -1/-20 =1/f

1/20 + 1/20 =1/f

(1 +1)/20 =1/f

2/20 = 1/f

or f= 10 cm

g(x) is the negative form of f(x)? because whenever its the negative form it reflects its self over the x axis. idk if this is right though.

step-by-step explanation:

77

step-by-step explanation: