Page 9 - Physics

Introduction to Physics

Physics is known to be a fundamental electric and magnetic fi elds. It has a
subject among all branches of science. wide range of applications in our daily
The content of physics is very broad life, including generation of electricity
and wide in such a way that it cannot be and fabrication of motors. Life could be
covered within a single domain. Therefore, diffi cult without electricity.
physics is divided into several branches,
each focusing on different aspects of the Astronomy
universe. Some of the major branches of Astronomy deals with the study of the
physics are: universe (cosmos) and everything contained
in it. The word astronomy originates from
Mechanics two Greek words, ‘astron’ which means
Mechanics is the branch of physics that ‘star’ and ‘nomos’ which means ‘laws. The
deals with objects that are either stationary Greeks referred to it as the study of laws of
or in motion, the infl uence of forces stars. Astronomy seeks to answer inquiries
acting on them and their impacts. Under such as how celestial objects like moons,
this branch, aspects like linear, circular, planets, stars, and galaxies originate and
and oscillatory motions of objects as well change with time.
as fl uids and their impacts are studied.
Geophysics
Heat Geophysics is the branch of physics
Heat is one among the forms of energy. that deals with physical processes and
Heat can be transferred from one point to physical properties of the Earth and its
another by either conduction, convection or surroundings. It speculates the interior
radiation. This branch of physics describes and exterior structure of the earth in terms
the phenomena of matter when heat energy of physical and chemical properties.
is supplied to it. These phenomena include
the expansion of matter, changes of states Electronics
of matter, and the anomalous expansion Electronics is the basis of modern
of water. technology. It involves the study of circuits
that are made of semiconductor components
Light like, diode, transistor, and integrated
Light is a form of energy that travels in a circuits. Most of communication devices
straight line. There are two types of light are made of semiconductor materials.
sources: Natural and artifi cial. The Sun Examples of devices that use the principles
is the primary or main source of natural of electronics are television, radio, Light
light. We see different objects with the aid Emitting Diode (LED) lamps, mobile
of light. Our eyes enable us to see objects phones, cameras, printers, and computers.
when light falls on them.
Physics of the atom
Electromagnetism This is a branch of physics which deals

Electromagnetism is the branch of physics with the behaviour of particles that make
that deals with the interaction between up the atom and accompanying energy.

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