A 2.5 cm tall object is placed perpendicular to the principal axis of

1.	A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.
Answer» Given :- Height of OBJECT = O = 2.5 cm Focal length = f = 15 cm Object distance = u = -30 cm Using LENS Formula, 1/V - 1/u = 1/f 1/v - (-1/30) = 1/15 1/v = 1/15 - 1/30 1/v = 2-1/30 v = 30 cm Again, m = I/O = v/u I/2.5 = 30/-30 I = -2.5 cm Hence, From this we CONCLUDE that Height of Image is same as height of Object.

A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.

Answer»

Given :-

Height of OBJECT = O = 2.5 cm

Focal length = f = 15 cm

Object distance = u = -30 cm

Using LENS Formula,

1/V - 1/u = 1/f

1/v - (-1/30) = 1/15

1/v = 1/15 - 1/30

1/v = 2-1/30

v = 30 cm

Again,

m = I/O = v/u

I/2.5 = 30/-30

I = -2.5 cm

Hence,

From this we CONCLUDE that Height of Image is same as height of Object.

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A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.​

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A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.