(i) Place a strong source of white Light at the f9qqs of the converging lens.
(iii) Allow the light beam to pass through a transparent glass tank containing clear water. In that clear water dissolve 200g sodium, thiosulphate in about 2 L of clean water in the tank and add 1 to2 mLof conc. H2SO4 acid.
(iii) Allow the beam of light to pass through a circular a made of a cardboard. Obtain a sharp image of the circular on screen by using converging lens.
