INTRODUCTION TO
PHYSICS
What is physics?
Physics is the branch of science which deals with matter in
relation to energy.
Matter is anything which occupies space and it has weight.
Energy is the capacity or ability to do work.
What is science?
Science is the systematic study of nature.
A person who studies
physics is called a physicist.
Branches of physics
Physics is divided into various branches such as;
i.
Mechanics – this is the study of motion of
bodies in the frame of reference.
ii.
Optics – this is the study of physical
properties of light.
iii.
Atomic physics – this is the study of atoms specifically
the electrons and its properties.
iv.
Electromagnetism – this is the study of
electrical and magnetic fields as two aspects of the same phenomenon.
v.
Geophysics – this is the study of physical
properties of the earth.
vi.
Astronomy – this is the study of celestial
bodies such as stars, galaxies, planets, etc
vii.
Electronics – this is the study of the flow of
electrons in a circuit.
RELATIONSHIP BETWEEN PHYSICS AND OTHER SUBJECTS
1.
Chemistry – devices used in studying chemistry
such as Bunsen burner and centrifugal device are made from the application of
physics. The study atomic physics is also very useful in chemistry.
2.
Biology – physics has simplified the study of
living things. Those powerful microscopes used in studying biology are made
from the application of physics. Different instruments for measuring blood
pressure, body temperature, etc are also made by using physics laws.
3.
Geography – various devices used in geography to
study whether and climate are made from application of physics. Example of
these devices are barometers, thermometers wind vane.
4.
Mathematics – physics are usually simplified by
using mathematics expressions. Thus, Mathematics is the language used by
physicist to simplify its information and communication.
5.
History – the study radioactivity in physics has
enabled the use of Carbon 14 to determine dates in historical excavation.
IMPORTANCE OF STUDYING PHYSICS
1.
Knowledge expansion
The study of physics expands our knowledge.
We learn about how different machines work and also understand how some natural
phenomena such as earthquake, floods and winds occur.
2.
Carrier development
People who study physics may further study
to be doctors, engineers, computer scientists and many other carriers which
require the knowledge of physics.
3.
Basic for most modern technology
Studying physics gives a better understand
on a modern technology. Devices such as x-ray machines, gas cookers,
refrigerators are made from the principles of physics.
APPLICATION OF PHYSICS IN DAILY LIFE
1.
Communication – we use radio, television,
telephone for communication among us every day.
2.
Entertainment – we use music players, Dvd
players, computer games, etc. for entertainment.
3.
Transportation – we use cars, airplane, and
ships for traveling from one place to another place.
4.
In medicine – we use various machine in
hospitals for diagnosis and treatment e.g. x-ray machine, ultra sound machine,
thermometers, etc
5.
Agriculture – we use farm equipment's such as
tractors, harvester, sprinklers, etc
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