1 These thio relaxers have a gentler action than other relaxer chemicals, so are a popular option when you want effective straightening with a lower risk of damage to the hair. 2  Japanese straightening systems use thio based relaxers.ons. 1  As the name suggests, this technique relaxes hair rather then leaving it poker straight, so if you want absolute stick straight and frizz-free hair, this method may not be for you. 2  As with every chemical process, the ever present risk of damage is there.
Types of Optical Illusions. There are currently three types of optical illusions: literal illusions, cognitive illusions, and physiological illusions. Each of these illusions trick our brain into misunderstanding what we see in various ways. A cognitive illusion happens when the brain perceives an object based on prior knowledge or assumptions.
10/5/2009 ECE 1461 - 2009 - PRHerman 2. Laser Types âI. ï® For More Depth: Follow Svelto: Principles of Lasers 4thEd; Reading sections identified below. ï® Also useful: Hechtsâ The Laser Guidebook. ï® Types of Lasers. ï® 9.2 Solid State Lasers: glass, crystal; not Semiconductor. ï® 9.2.2.1 Nd:Yag Laser; 9.2.2.2 Nd: Glass.