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ICSE Class 10 Physics Question 8 of 27

Solved 2024 Question Paper ICSE Class 10 Physics — Question 23

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Question

Question 3(i)

(a) In a reading glass what is the position of the object with respect to the convex lens used?

(b) Why can we not use concave lens for the same purpose?

Answer

(a) In a reading glass, the object is placed between the optical center and the principal focus of the convex lens to produce a virtual and enlarged image of the object so that a magnified view of the object can be seen.

(b) A concave lens always forms a virtual, erect, but diminished (smaller) image of the object so it cannot magnify the object.