It is desired to obtain an erect image of an object, using a convex lers of focal lergth 20 cm (i) What should be the range of distance of the object from the lens? (ii) Will the image be bigger or smaller than the object? (iii) Draw a ray diagram to show the image fomation in this case.
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(a) (i) Range of the object distance is 0 to 20 cm from the pole.
(ii) Image will be bigger than the object.
(iii) Ray Diagram (Refer Fig.1)
(b) (i) Yes, complete image will be formed.
(ii) Refer Fig. 2
(iii) Intensity will be reduced as the light falling on the lower (covered) portion will not reach the position of image.
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