Question

focal length of a convex lens is 40 centimetre is an object is kept at a distance of 60 cm from the lens then find the image distance and magnification produced by the lens​

Answer 1

Answer:

Image distance= 120 cm

Magnification = -2

Explanation:

F=40 cm

U = -60 cm

(Minus sign is used because it indicates that object is in front of mirror)

1/v - 1/u = 1/f

1/v = 1/f + 1/u

1/v = 1/40 - (-1/60)

1/v= 1/120

v= 120 cm

m= v/u

m = 120/-60 = -2

Answer 2

Answer:

D = 120 cm

Magnification = -2 cm

Explanation: