)object clearly at a distance of 30 cm with eyeglasses power of +2.5 diopters. determine the focal length of the lenses of the eyeglasses. find the person's near point without wearing the eyeglasses. you can neglect the distance from the lenses to the eyes. 1. a person can see an that have a (6 marks) m due to the point charges determine the net electric field at the point (3,3) q10 hc located at (2,4) m, qa = 5 uc located at (-1,-6) m and q,=-8 c located at (-3,5) m. (b)