An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. (i) Use lens formula to find the distance of the image from the lens. List four characteristics of image (nature, position, size, erest/inverted) formed by the lens in this case. (iii) Draw ary diagram to justify your answer of part (ii).

An object is placed at a distance of 60 cm from a concave lens of foca

1.	An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. (i) Use lens formula to find the distance of the image from the lens. List four characteristics of image (nature, position, size, erest/inverted) formed by the lens in this case. (iii) Draw ary diagram to justify your answer of part (ii).
Answer» Solution :`u = -60cm,F = -30 cm` (i) Lens FORMULA, `1/f = 1/V - 1/u` `1/v = 1/f +1/u` `rArr 1/v=1/-30+1/-60=(2+1)/-60=3/-60` `v=(-60)/3 =-20cm `The image is at a distance of 20 cm from the lens. (ii) Characteristics of image formed. The image is - `{:(" vortual,", erect,",in front of the lens between 'O' and 'F',"),(" on the same side of the object, and ","","diminished."):}` (III)