Question

an object is placed at the distance of 100 cm from a converging lens of focal length 40 cm. what is the nature and position of the image? ​

Answer 1

Explanation:

) Since the object is placed at a distance greater than the focal length of the lens, so the image formed is real and inverted.

(ii) u = -100cm, f = 40cm

Lens formula: 1/v – 1/u = 1/f

1/v – 1/-100 = 1/40

1/v = 1/40 – 1/100

1/v = (5 -2)/200 = 3/200

V = 66.6 cm

Image is formed 66.6 cm behind the convex lens.

Answer 2

(i) Since the object is placed at a distance greater than the focal length of the lens, so the image formed is real and inverted.

(ii) u = -100cm, f = 40cm

Lens formula: 1/v – 1/u = 1/f

1/v – 1/-100 = 1/40

1/v = 1/40 – 1/100

1/v = (5 -2)/200 = 3/200

V = 66.6 cm

Image is formed 66.6 cm behind the convex lens.