Gholamreza Shamsipour received his M.Sc. in medical physics from Tehran University for Medical Sciences and B.Sc. in atomic and molecular physics from Iran University for Science and Technology. He is currently a physics teacher and his educational research interest is finding new experiments for teaching physics and also relating physics and medicine.Physics group, Allame Helli High School, Ghaffari St., Kamali St., Karegar Ave., Tehran, Iran; rshamsipour@yahoo.com