Physics Notes (Introduction) Chapter 1: X class

Q.2. Define Physics. Write down the name of its branches.

Ans: Physics:

The branch of physical science in which we discuss interaction between Matter and Energy is called Physics. It is an experimental science, which mostly depends upon "Experimental observation" as well as quantitative measurement.

BRANCHES OF PHYSICS:

1. MECHANICS: In this branch, we study about the forces which are acting on matter as well as the motion and rest of body.
2. ELECTRICITY: In this branch, we study about the motion and rest of electric charge.
3. ELECTROMAGNETISM: We study and observe the laws of electrostatic and magnetism, in Electromagnetism.
4. SOLID STATE PHYSICS: Study about crystalline solid in which atoms are arranged in three dimensions is called Solid State Physics.
5. ATOMIC PHYSICS: Atomic Physics refers to study about structure, properties and behaviour of electron.
6. NUCLEAR PHYSICS: In this branch we study about structure and properties of Nucleus as well as the reaction between the Nuclei of atoms.
7. PLASMA PHYSICS: The branch, which belongs to highly, ionized atiom. When all electron escape from an atom then it becomes high ionized, the mixture of highly ionized atom and electron is called plasma.
8. BIO-PHYSICS: The study of bio-system and its structure according to physics methods is known as Bio-Physics.
9. ASTRO-PHYSICS: Study of Astronomical bodies and astronomical system is know as Astro-Physics.