Q.

A wire is bent in the shape of a right angled triangle and is placed in front of a concave mirror of focal length f, as shown in the figure. Which of the figures shown in the four options qualitatively represent(s) the shape of the image of the bent wire? (These figures are not to scale.)

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a

b

c

d

answer is D.

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Detailed Solution

distance of a point A is f2Let A’ is the image of A from mirror, for this imageS1v+1−f2=1−f1v=2f−1f=1fImage of line AB should be perpendicular to the principle axis & image of F will form at infinity, therefore correct image diagram isff−u=h2h1            h2=−ff−x−f+xh2=f
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A wire is bent in the shape of a right angled triangle and is placed in front of a concave mirror of focal length f, as shown in the figure. Which of the figures shown in the four options qualitatively represent(s) the shape of the image of the bent wire? (These figures are not to scale.)