Question

An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image in formed on the screen. Place at a distance of 10 cm from the lens. Calculate the focal length of the lens.

Answer 1

Answer:

Heya♥️☺️✌️

Explanation:

✏️h1 = 50 cm

h2 = -20 cm (real image)

v = 10 cm

m = v/u = h2/h1

10/u = -20/50

u = -25 cm

1/v – 1/u = 1/f

1/10 – 1/-25 = 1/f

f = 50/7 = 7.14 cm

✒️Hope it helps ✌️☺️♥️...