Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Applied Chemistry and Chemical Technology,University of Karachi,Karachi,Pakistan;
Department of Computer Science,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Computer Science,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;
Department of Physics,Federal Urdu University of Arts,Science and Technology,Karachi,Pakistan;