Question

18. A student wants to obtain magnified image of an object AB as on a screen. Which one of the following arrangements shows the correct position of AB for him/her to be successful ? M M M A CA B (b) B 2F O (a) F1 1 F1 2F1 C1 N N M M B. (d) F1 2F1 (c) 2F F C1 N N P.T.O.​

Answer 1

Explanation:

then he or she get magnified image

Answer 2

CORRECT QUESTION

Please refer to the picture for options.

ANSWER

The court answer is option (c)

• To get a real and magnified image from a convex lens the object must be kept between at F and 2F or at the focus (F).
• The object placed at focus will form a magnified and real image at infinity which cannot be taken on screen
• Therefore, it should be keot between 'F' and '2F'.
• A convex lens converges parallel rays to a point on the other side of the lens.
• This point is referred to as the focal point of the lens measured as the distance between the centre the lens.
• Uses; to treat hypermetropia, telescopes and magnifying lens. In camera lenses as they focus light for clear picture.
• Also used in projectors, binoculars, optical microscopes, peep hole etc.

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