Diaphragm (optics) curved blades improve the roundness of the iris opening. In a photograph, the number of blades that the iris diaphragm has can be guessed by counting the number of diffraction spikes converging from a light source or bright reflection. For an odd number of blades, there are twice as many spikes as there are blades. In case of an even number of blades, the two spikes per blade will overlap each other, so the number of spikes visible will be the number of blades in the diaphragm used. This is most apparent in pictures taken in the dark with small
She Has a Name six years. The drama centers on Jason's infiltration of a brothel ring that is trafficking girls into Bangkok. Jason comes to believe that Number 18 could be a key witness to a human trafficking incident and tries to gain her trust and persuade her to testify against the ring. The victimized child in the play is known only by the number 18 to reflect how traffickers often dehumanize their victims by giving them a new name or simply a number, which in some cases is branded onto the victim's body. Waldschmidt said he hoped that "She Has a Name" will