The preamble contains the socio-
economic goals of Indian polity. These are: to
secure all its citizens social, economic and
political justice; liberty of thought; equality of
status and opportunity, and to promote among
them fraternity so as to secure the dignity of the
Individual and the unity and integrity of the
Nation.
ভাষা ও ভাষার উৎপত্তি
Plasma Physics (প্লাজমা পদার্থবিদ্যা)
Laser (লেজার)
Quantum materials (কোয়ান্টাম উপকরণ)
Particle physics (কণা পদার্থবিজ্ঞান)
Optics (অপটিক্স এবং ফোটোনিক্স)