In a federal form of government
separation of powers is not an essential element.
A federal state is a political entity characterized
by a union of partially self-governing states or
regions under a central (federal) government in
a single political system. So the federation is a
form of government in which a division of
powers between central govt. and regional govt.
eg. India.
ভাষা ও ভাষার উৎপত্তি
Plasma Physics (প্লাজমা পদার্থবিদ্যা)
Laser (লেজার)
Quantum materials (কোয়ান্টাম উপকরণ)
Particle physics (কণা পদার্থবিজ্ঞান)
Optics (অপটিক্স এবং ফোটোনিক্স)