Physics Department;
College of Science;
Al Imam Mohammad Ibn Saud Islamic University;
Riyadh;
KSA;
Physics Department;
College of Science;
Sudan University of Science & Technology;
Khartoum;
Sudan;
Physics Department;
Faculty of Science;
Khartoum University;
Khartoum;
Sudan;
Science Department;
College of Education;
Sudan University of Science & Technology;
Khartoum;
Sudan;
Gravitational; Energy; Mass; Radiation; Generalized; General; Relativity;