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Physical World

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Physics Part I

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said : “The most incomprehensible thing about the world is that it is comprehensible”?

The Physical world around us consists of different complex natural phenomena and entities. So the world is incomprehensible. But, with the help of study and observations it has been found that all these phenomena are based on some basic physical laws and so it is comprehensible.

Name some of the popular branches of science.

Some of the popular branches of science are:
  1. Physics
  2. Chemistry
  3. Botany
  4. Zoology
  5. Geology

What do you understand by matter? What are its different phases? 

Any thing that possesses weight and occupies space is called matter.

The three phases of matter are: 

  1. Solid state
  2. Liquid state
  3. Gaseous state

What is science?

The word Science originates from the Latin verb Scientia meaning 'to know'. 

Science is a systematic attempt to understand natural phenomena in as much detail and depth as possible, and use the knowledge so gained to predict, modify and control phenomena. Science is exploring, experimenting and predicting from what we see around us.


What is Physics?

Physics is that branch of science which deals with the study of properties of matter, energy and their interactions.


In Physics, matter and energy are used together in an equation. What is the relation between them?

Yes, the mass of an object is a measure of its energy content. 

The relation between mass-energy is given by, 
                              E =mc2

m = Mass of an object
c  = Speed of Light

This equation is also known as Mass-Energy Equivalence relation.