1. Department of Physics, Kamarajar Government Arts College, Surandai – 627859, Tenkasi District, Tamil Nadu, India
2. Department of Physics, Thiru Kolanjiappar Government Arts College, Cuddalore – 626001, Cuddalore District, Tamil Nadu, India
3. Department of Physics, Kamarajar Government Arts College, Surandai – 627859, Tenkasi District, Tamil Nadu, India.