a convex lens has a focal lenght of 12cm. At which of the following positions should an object be placed so that this convex lens may act as magnifying glass?

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Solution

Convex lens acts as a magnifying glass, when object is placed between the optical centre and focus i.e at distance less than 12 cm.

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Similar questions

A convex lens has a focal length of 10 cm. At which of the following position should an object be placed so that this convex lens may act as a magnifying glass ? (a) 15 cm (b) 7 cm (c) 20 cm (d) 25 cm

Q. A convex lens has a focal length of 10 cm. At which of the following position should an object be placed so that this convex lens may act as a magnifying glass?

(a) 15 cm
(b) 7 cm
(c) 20 cm
(d) 25 cm

A convex lens has a focal length of 10 cm. At which of the following positions should an object be placed so that this convex lens may act as a magnifying glass?

Q. (a) What type of lens is used as a magnifying glass?
(b) What type of lens is used to correct the defect of vision called myopia?
(c) A convex lens has a focal length of 10.5 cm. Where should an object be placed in front of this convex lens so as to obtain an image which is real, inverted and same size as the object?

Q. A convex lens has a focal length of 20 cm. Where should an object be placed in front of this convex lens so as to obtained an image which is real, inverted and same size as the object? Draw the ray diagram to show the formation of image in this case.

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