Recent content by ghulam

  1. G

    Geometric Optics- Two Questions

    p=-2.5d f=-1/2.5=-0.4 i/f=i/v-i/u -2.5=1/v-(-1/(20/100)) -2.5=1/v+5 1/v=-7.5 m=v/u (1/-7.5)/(-20/100) (1/-7.5)*-5 2/3 thus, it is a concave lens