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WBJEEA wire is bent in the shape of a right angled triangle and...
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.)
Solution:
Distance of point A is f2
Let A' is the image of A from mirror, for this image
1v+1-f2=1-f
1v=2f=1f=1f
Image of line AB should be perpendicular to the principle axis and image of F will form at infinity, therefor correct image diagram is
ff-u=h2h1
h2=-f(f-x)-f+x
h2=f
Distance of point A is f2
Let A' is the image of A from mirror, for this image
1v+1-f2=1-f
1v=2f=1f=1f
Image of line AB should be perpendicular to the principle axis and image of F will form at infinity, therefor correct image diagram is
ff-u=h2h1
h2=-f(f-x)-f+x
h2=f
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