SELECT * FROM question_mgmt as q WHERE id=3755 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=261 and ex_no='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Light - Reflection and Refraction where should an object be placed in front of a con

Question:

Where should an object be placed in front of a convex lens to get a real image of the size of the object?

(a) At the principal focus of the lens
(b) At twice the focal length
(c) At infinity
(d) Between the optical centre of the lens and its principal focus.

Answer:

(b) The image formed is real, inverted, and of the same size as the object. When an object is placed at the centre of curvature in front of a convex lens, its image is formed at the centre of curvature on the other side of the lens i.e at twice of focal length.


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