PHYSICAL QUANTITIES & MEASUREMENT INTRODUCTION TO PHYSICS & BRANCHES OF PHYSICS EXPLAINED IN URDU/HINDI CHAPTER 1 9TH CLASS PHYSICS WITH EXAMPLES.
Man has always been inspired by the wonders of nature. He has
always been fond of seeking and knowing the hidden truths and realities of
nature. He continued doing observations, experiments and here consequently here
we are, in the 21th century. Yep! It’s amazing to be in the era of technology.
- Science: The knowledge
gained through observations and experiments is called Science.
The word ‘Science’ has been derived from the Latin word ‘Scientia’
which means ‘knowledge’.
Upto 18th century, the study of material objects were
called Natural Philosophy. As knowledge going vast, the Natural Philosophy was
divided into two main classes:
- Physical Sciences: It was
subjected to study about non-living things.
- Biological Sciences: It was
subjected to study about living things.
In 9th century, Physical Sciences were divided into more
five branches; Physics, Chemistry, Astronomy, Geology and Meteorology,
- Physics: Physics deals
with the study of matter, energy and relation between them.
What is matter? Matter is everything which possesses some mass and
occupies some volume. What is energy?
Energy is basically ability to do work. In Physics, work is defined with the
motion of matter.
We are living in the technology era. From waking up in the morning
to going on the bed for sleep, even when we are sleeping, we are using
instruments, equipments and machinery as well. All of these instruments work on
the basic principles of Physics. For example, when we concern with refrigerator,
we actually are dealing with Physics. This is because refrigerator works upon
the principles of Thermodynamics, which is an important branch of Physics. Similarly
when we go somewhere and use vehicles, we take help of Physics because a
vehicle is made upon the principles of Mechanics which is also a fundamental
branch of Physics.
- Branches of Physics:
Here
are a few branches of Physics.
Mechanics: It is the study of motion of objects, its causes and
effects.
Heat: It deals with the nature of heat, modes of transfer and
effects of heat.
Light (Optics): It is the study of physical aspects of light, its
properties, working and use of optical instruments.
Sound: It deals with the physical aspects of sound waves, their
production, properties and applications.
Electricity and Magnetism: It is the study of the charges at rest
and in motion, their effects and their relationship with magnetism.
Atomic Physics: It is the study of the structure and properties of
atoms.
Nuclear Physics: It deals with properties and behavior of nuclei
the particles within the nuclei.
Plasma Physics: It is the study of Production, properties of the
ionic state of matter – the fourth state of matter.
Geophysics: It is the study of internal structure of Earth.
- Applications of Physics:
Here
are some applications of Physics in our daily life.
In our daily life, we hardly find a device where Physics is not
involved. In every aspect of life, Physics is involved today. All the means of
transportation, like car, train and aero plan etc, are made upon basic
principles of Physics. Similarly all the means of communication like radio,
television, mobile phone etc, are also made by studying fundamental laws and
principles of Physics. All the home appliances like air conditioner, vacuum cleaner,
microwave oven and electric fans, washing machines etc, all these work on the
principles of Physics. Electricity is the most obvious example of this.
Therefore, development and progress in the field of Physics has made our life
very comfortable and easy. It has also contributed so much in the development of
Science and Technology
We know that everything which has some advantages contains some
disadvantages also. Progress in Science and Technology can go to destruction
through atomic wars. So this is upon us how we take advantage of Science.
For understanding more comprehensively, watch
the video from start to end and a brief introduction on Physics and branches of
Physics explained in Urdu/Hindi.
In this video, you’ll learn: basics of
Physics, Introduction of Physics, a short history of Physics, What actually
Physics is? What does mean by Science? How Physics is related to Science? Which
important role is playing Physics in Science, Technology and our society? How
Physics affecting our daily life? How Physics is serving with its discoveries
and applications? What are the main branches of Physics? Answers of all of
these questions are explained briefly with examples. If there's still any
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