ZnO nanoparticles are synthesized in three different solvents .
ZnO nanoparticles ' optical absorptions studied to determine in which solvent the nanoparticles absorb maximum visible light in the optical band ranging between 400 nm and 700 nm .
ZnO nanoparticles are synthesized in three different solvents and their optical absorptions studied to determine in which solvent the nanoparticles absorb maximum visible light in the optical band ranging between 400 nm and 700 nm .