SSC (English Medium) Class 10th Board ExamMaharashtra State Board
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# An Object is Placed at a Distance of 100 Cm from a Converging Lens of Focal Length 40 Cm. (I) What is the Nature of Image? (Ii) What is the Position of Image? - SSC (English Medium) Class 10th Board Exam - Science and Technology - 1

#### Question

An object is placed at a distance of 100 cm from a converging lens of focal length 40 cm.
(i) What is the nature of image?
(ii) What is the position of image?

#### Solution

Given:
Object distance, =-100 cm
Focal length, f = 40 cm
Applying lens formula, we get:
1/v-1/= 1/f
1/v- 1/(-100) = 1/40
or, 1/v = 1/40 - 1/100
or, 1/v = 6/400
or, 1/v = 3/200
or, v = 200/3 = +66.6 cm
Now
Magnification, m = v/u
m= (200/3)/(-100)
m=-2/3
(i) The value of magnification is negative, therefore, the image will be real and inverted.
(ii) The value of is (+66.6 cm); therefore, the image is formed 66.6 cm behind the convex lens.

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#### APPEARS IN

Solution An Object is Placed at a Distance of 100 Cm from a Converging Lens of Focal Length 40 Cm. (I) What is the Nature of Image? (Ii) What is the Position of Image? Concept: Mirror Formula and Magnification.
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