9th Physics Chapter 9 2025 Short Questions
9th Physics Chapter 9 2025 Short Questions answer notes. Physics 9th Chapter 9 New Book Short Questions solution.
Short Answer Questions.
9.1 State in your own words, what is science? Write its two main groups.
Science is a collective knowledge about the natural phenomena, process and events occurring around us. There are two main groups of science, the biological sciences and the physical sciences.
==========================================
9.2 What is Physics all about? Name some of its branches.
Physics is a branch of science which deals with the matter, energy and their mutual relationship. Some branches of Physics are Mechanics, Heat and thermodynamics, Acoustics, Optics, Electromagnetism, Quantum Mechanics, Relativistic Mechanics, Nuclear Physics, Particle Physics and Astronomy.
==========================================
9.3 What is meant by interdisciplinary fields? Give a few examples.
Interdisciplinary fields don not belong to just one area like Physics or Chemistry but use a mix of both and sometimes even more. For example Biophysics, Medical Physics, Astrophysics, Geophysics, Climate Physics and Computation Physics.
==========================================
9.4 List the main steps of scientific method.
Main steps of scientific method are observation, hypothesis, experiment, theory, prediction, falsifiability and law.
==========================================
9.5 What is a hypothesis? Give an example.
On the basis of data collected through observation or experimentation, we can develop a hypothesis. Lets check the example of hypothesis. Shadow of opaque objects are formed when they come in path of light because light travels in straight line.
==========================================
9.6 Distinguish between a theory and law of physics.
A law tells what happens and a theory explains why it happens.
==========================================
9.7 What is the basis of laser technology?
Laser technology is based on the principles of atomic physics.
==========================================
9.8 What is falsifiability concept? How is it important?
Falsifiability is a concept that a hypothesis must be testable and can be proven false if it is wrong. Falsifiability is important because it helps keep science testable and truthful. It makes sure science science is based on evidence.
==========================================
Check! some important links below
