Question

5 centimetre is placed perpendicular to the principal axis of a convex lens of focal length 10 cm if the object is placed 30 cm away from the lens find the position size and nature of the image​

Answer 1

Answer:

15cm between 2f2 and f2

15cm between 2f2 and f2Explanation:

According to the question:

Object distance,u = -30 cm

Focal length ,f = 10 cm

Let the image distance be v

By lens formula:

1/v - 1/u = 1/f 

1/v = 1/u + 1/f

1/v = 1/-30cm + 1/10cm

1/v = (-1+3)/30

1/v = 1/15 cm

V = 15cm

Thus , image is obtained at 15 cm between 2F2 and F2

Answer 2

Explanation:

According to the question:

• Object distance,u = -30 cm

• Focal length ,f = 10 cm

Let the image distance be v

By lens formula:

• 1/v - 1/u = 1/f
• 1/v = 1/u + 1/f
• 1/v = 1/-30cm + 1/10cm
• 1/v = (-1+3)/30
• 1/v = 1/15 cm
• V = 15cm

Thus , image is obtained at 15 cm between 2F2 and F2.