Question

an object is placed at a distance of 30cm from a concave lens of focal length 15cm.list 4 characteristics - size, position etc of the image​

Answer 1

I hope it will help you

Answer 2

1/v = 1/f -1/u

   = 1/-15 - 1/-30

   =  -1/15 + 1/30

    = -2+1/30 =-1/30

1/v = -1/30

v = -30 cm

size of the image = -30 cm

nature = real  & inverted

position = behind the focus