Question

An object 5cm in length is held 25cm away from a converging lens of focal length 10cm. Draw the ray diagram and find the position, size and nature of the image formed​

Answer 1

Answer:

Given :

➝ Object is 5 cm in length

➝ Converging lens has focal length of 10 cm.

To Find :

➝ Position, Size, Nature of the Image Formed .

Solution :

➝ h1 = 5 cm

➝u =-25 cm

➝f = 10 cm

• ➝Lens formula : 1/v – 1/u = 1/f

➝1/v – 1/-25 = 1/10

➝1/v = 1/10 – 1/25 = (5 – 2)/50 = 3/50

➝V = 16.6

• Image is 16.6 cm behind the convex lens.

➝m = v/u

➝ (50/3)/-25

➝ - (2/3) (Image is real and inverted)

• m = h2/h1

➝ -(2/3) = h2/5

➝h2 = -10/3 = -3.33 cm

➝Image is 3.33 cm in size and is real and inverted.