A convex lens of focal length 15 cm is used as a magnifying glass.At what position from the lens should a textbook be placed to get a magnification of +2.00? (Assume lens to be at origin)

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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

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 magnifying lens is of focal length 10 cm. At what dis†an ce from the lens an object should be placed to view the object at maximum magnification

Q. A magnifying lens is of focal length

10 c m

. If

D c m

is the distance from the lens, where an object should be placed to view the object at maximum magnification, then find the value of

(\frac{14}{50} D)

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