CBSE Class 10 Science 2017 · Paper 31/1/2/C · Question 15

Light - Reflection and Refraction 3 marks Medium

An object is placed perpendicular to the principal axis of a convex lens of focal length 18 cm. The distance of the object from the lens is 27 cm. Find the position and nature of the image formed.

Answer

$v = + 54$ cm: a real, inverted image, twice the size of the object, formed on the other side of the lens, beyond $2 F_{2}$ .

Position:

v = + 54

cm. The image is formed

54

cm from the lens, on the other side of the lens from the object (beyond

2 F_{2}

, since

2 f = 36

cm). Nature: real and inverted, and magnified to twice the size of the object, since

m = \frac{v}{u} = \frac{+ 54}{- 27} = - 2

🔒 Step-by-step solution

From the board paper

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CBSE Class 10 Science 2017 · Paper 31/1/2/C · Question 15

Answer

From the board paper

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