A student performs an experiment to estimate the focal length of a convex lens by obtaining the image of a distant window on a white screen. The image formed on the white screen is :
(1) virtual, erect and magnified
(2) real, erect and magnified
(3) real, inverted and diminished
(4) virtual, inverted and diminished

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Solution

Convex lens converges all the rays coming from a distant object to its focus to form a sharp image. The image obtained is real as it can be obtained on a screen placed on the focus of the lens, also the image formed is diminished and inverted in nature.

Hence, the correct answer is option 3.

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10 c m

.
(a)

8 c m

(b)

15 c m

(c)

20 c m

(d)

25 c m .

Which position of the object will produce ..............
i) a diminished, real and inverted image ?
ii) a magnified, real and inverted image ?
iii) a magnified, virtual and erect image ?
iv) an image of same size as the object ?

Justify your answer in each case.

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A magnifying glass forms :

(a) a real and diminished image

(b) a real and magnified image

(d) a virtual and diminished image.

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Convex lens converges all the rays coming from a distant object to its focus to form a sharp image. The image obtained is real as it can be obtained on a screen placed on the focus of the lens, also the image formed is diminished and inverted in nature. Hence, the correct answer is option 3.

Convex lens converges all the rays coming from a distant object to its focus to form a sharp image. The image obtained is real as it can be obtained on a screen placed on the focus of the lens, also the image formed is diminished and inverted in nature.

Hence, the correct answer is option 3.