The above image shows a thin lens of focal length 5m.
(i) What is the kind of lens shown in the above figure?
(ii) If a real inverted image is to be formed by this lens at a distance of 7m from the optical centre, then show with calculation where should the object be placed?
(iii) Draw a neatly labelled diagram of the image formation mentioned in (ii)
OR
A 10 cm long pencil is placed 5 cm in front of a concave mirror having a radius of curvature of 40 cm
(i) Determine the position of the image formed by this mirror.
(ii) What is the size of the image?
(iii)Draw a ray diagram to show the formation of the image as mentioned in the part (i).

Solution

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