    Question

# A luminous point object is placed at O, whose image is formed at I as shown in figure. Line AB is the optical axis. Which of the following statement is/are correct?

A
If a lens is used to obtain the image, then it must be a diverging lens and its optical centre will be the intersection point of line AB and OI.
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B
If a lens is used to obtain the image, then it must be a converging lens and its optical centre will be the intersection point of line AB and OI.
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C
I is a real image.
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D
If a mirror is used to obtain the image then the mirror must be concave and object and image subtend equal angles at the pole of the mirror.
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Solution

## The correct option is D If a mirror is used to obtain the image then the mirror must be concave and object and image subtend equal angles at the pole of the mirror.Since, the image is inverted. So, it must be real which can be obtained either by convex/ converging lens or concave- Mirror. (A) Wrong because lens / mirror used must be of converging nature. (B) LensOptical centre (C) will be the intersection of line AB and OI. (C) C[Pole point]From figure, ∠OCB=∠ICB (D) in both the cases, the images formed are Real due to actual meeting of Reflected light Rays. Option B,C,D are Correct.  Suggest Corrections  0      Similar questions  Related Videos   Playing with Glass Slabs
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