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The Scope and Excitement of Physics

Scope of Physics:

Physics is a part of day-to-day life of an individual. It deals with the study of finite and infinite size objects. The subject is vast and deals with the quantitative and qualitative experimental conditions. Classical physics has following branches.

  • Classical Mechanics
  • Thermodynamics
  • Electromagnetism
  • Optics

Modern day Physics deals with concepts of Relativity and Quantum Mechanics.

The Scope and Excitement of Physics pdf


Relativity was studied and introduced by Albert Einstein. The theory of relativity has given insights on the physics of world and atmosphere. This theory helps in understanding the inertial (non-accelerated) and non-inertial (accelerated) frames of reference and subatomic particles. For this theory, Sir Albert Einstein is known as Father of Modern Physics.

The Scope and Excitement of Physics pdf

Quantum Mechanics:

The renowned physicist Richard Feynman has studied and introduced Quantum Mechanics. It deals with the study of motion and interaction of subatomic particles and wave-particle duality. The quantum mechanics give proper mathematical description. It helps in understanding universe operates at the atomic level.

Based on the speed and size of matter in consideration, the domains can be classified as classical mechanics, classical mechanics, relativistic mechanics, quantum mechanics and quantum field theory.

The Scope and Excitement of Physics pdf


Excitement of Physics:

Have you ever imagined the possibility of teleportation? Ever wondered how the teleportation works? Ancient people believed the existence of a device which can define the position of the planet or constellation within no time. The teleportation can help in defining sky maps. Curiosity is the mother of inventions, as your curiosity increases you explore and go into the depth of the subject to understand the topic. Quantum teleportation has been established; the information about atom or photon transported from one place to the other has been established. It is only about matter of things which are being transported not any living creatures like humans

The Scope and Excitement of Physics pdf

Physics Definition, What Is Physics

Constellations and Constellation of Stars

There are thousands and thousands of stars in the night sky and can be observed in the moonless night. These stars can be connected as dots and make different shapes and patterns. The bright stars are easy to identify and can form patterns, such a group of stars is called as constellations. These patterns typically represent animals, mythological people or gods, mythological creatures, or manufactured devices. There are about 88 modern constellations in the celestial sphere. In olden days, these constellation are named after their appearance. The constellations Perseus, Andromeda, Cetus, Cassiopeia and Pegasus are named as per Greek mythology. The name of these constellations varies depending upon the culture e.g.: Pisces – the fish in Greek and Meena- the fish in Sanskrit. The earth rotates in the direction from west to east and hence the constellations also appear to move. Earth is spherical in shape and the entire constellation is not in line of sight, as a result all the constellations are not visible. Northern hemisphere constellation cannot be viewed in south and southern hemisphere constellation cannot be viewed in north.  A person at the equator can see most of the constellations.

The Scope and Excitement of Physics pdf

Zodiac constellations:

The word zodiac refers to the area of the sky approximately 8° north or south of the sun’s path along the sky (called the ecliptic). The path of the moon and visible planets are part of the zodiac belt. There are 12 major constellations in ecliptic and were used to track time based on movement of sun. The major constellations are

Aries (Mesha), Taurus (Vrushabha), Gemini (Mithuna), Crab/Cancer (Karka), Leo (Simha), Virgo (Kanya), Libra (Tula), Scorpion (Vruschika), Saggitarius (Dhanusha), Capricorn (Makara), Aquarius (Kumbha), Pisces (Meena).

Big Dipper:

Saptarishi or big dipper is a group of seven stars which can be witnessed in the northern hemisphere. It is a part of Ursa Major (The great Bear). This group of stars looks like big ladle or like a wheel. Ursa Major constellation has two stars which point towards the pole star.

Pole star commonly called as Polaris or Dhruva, is the only star in the night which is constant in position and does not move from east to west. The position looks stationery as it is above the earth’s axis.


It is a constellation seen throughout the world. Orion is also called as ‘the hunter’ or Mriga in India. This constellation has a number of bright large stars. A section of the constellation has three large stars which are in line with each other and forms the “belt” of the hunter. These stars point towards the brightest star in the night sky – Sirius. The constellation can be viewed at night in the sky. Zodiac constellations are interesting to identify and watch with the help of a star chart. Try yourself to identify the constellations!

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2019-11-19T11:02:27+00:00 Categories: CBSE Class 11 Syllabus|0 Comments
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