Gravity - mrana/physics-society/gravity/Gravity IV 2013.pdfآ  2013-14 3 GRAVITY Message From the Desk

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  • Gravity Volume IV, 2013 SSNC

    Physics Society Swami Shraddhanand College

    University of Delhi, Alipur, Delhi-110036

  • 2GRAVITY 2013-14

    Inaugural of ESST-2012 Renewable Energy Exhibition-

    Lecture on God Particle Lecture on God Particle

    Discussion Session of EESC- Valedictory Session of ESST-

    Physics Activities 2013-14Physics Activities 2013-14Physics Activities 2013-14Physics Activities 2013-14Physics Activities 2013-14

    Shri Krishna Sahitya Sadan

  • GRAVITY2013-14 3

    Message From the Desk of the Principal

    I am glad to know that the Department of Physics of the college is planning to bring out the fifth issue of the magazine “Gravity” which will enable the students and teachers to express their views on the most recent happenings in field of Physics. As has been with the previous issue, the magazine shall include other departmental activities and variety of information to stimulate academic dialogue.

    I wish all the best for the success of the magazine and future activities of the department.

    Dr. S.K. Kundra Dr. S.K. Kundra Dr. S.K. Kundra Dr. S.K. Kundra Dr. S.K. Kundra Principal,SSNC

    Lokeh JºkuUn egkfo|ky; (fnYyh fo'ofo|ky;)] vyhiqj] fnYyh&110036

    Swami Shraddhanand College (University of Delhi), Alipur, Delhi-110036

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    MessageMessageMessageMessageMessage From teacher In-charge of the Physics From teacher In-charge of the Physics From teacher In-charge of the Physics From teacher In-charge of the Physics From teacher In-charge of the Physics

    DepartmentDepartmentDepartmentDepartmentDepartment Swami Shraddhanand CollegeSwami Shraddhanand CollegeSwami Shraddhanand CollegeSwami Shraddhanand CollegeSwami Shraddhanand College

    It is the matter of great happiness and pride to announce the fifth issue of departmental magazine “GRAVITY”. The “Gravity” will enable the students and teachers to express their views on the most recent happenings in field of Physics.

    As precurred with the previous issue the magazine shall include other departmental activities and variety of information to stimulate academic dialogue.

    Wish the magazine a great success.

    Dr. Vinod PrasadDr. Vinod PrasadDr. Vinod PrasadDr. Vinod PrasadDr. Vinod Prasad

    Teacher Incharge,

    Department of Physics

    Lokeh JºkuUn egkfo|ky; (fnYyh fo'ofo|ky;)] vyhiqj] fnYyh&110036

    Swami Shraddhanand College (University of Delhi), Alipur, Delhi-110036

  • GRAVITY2013-14 5

    Preface & Editorial

    The Physics department of SSN College came out with fresh edition of its annual publication “GRAVITY”.“GRAVITY”.“GRAVITY”.“GRAVITY”.“GRAVITY”. The main motto behind it was to bring the wandering minds into the wondering minds.

    This edition of magazine contains a wide range of topics which lie in the arena of your interest and enhance your curiosity in knowing the nature of science. As always, we reached out to a distinguished panel of contributors and as usual we have run up a huge debt of gratitude.

    This issue cleaves many hidden facts and figures also that could be accessible to all. Knowledge is immeasurably vast but it should not dampen one from pursuing the quest for knowledge. Its single spark leads us to new horizon and spirituality. This ordinary magazine is an extraordinary step towards perennial spring of knowledge which can alone quench the thirst of soul. I hope more students will join the caravan on this path of knowledge in years to come and readers will boost their morale and confidence in their own ways.

    All of this would have been impossible without the constant efforts of our team, who expediently managed the subject of content and design to bring forth this issue in time.

    I hope you enjoy this journey which aims to provide enough matter to arouse your interest but not enough to keep you from wanting more.

    “Gravity is a translation of wonderful ideas of physics…”

    EDITORIAL BOARD

    Dr. Mukesh Rana Dr. Mukesh Rana Dr. Mukesh Rana Dr. Mukesh Rana Dr. Mukesh Rana . Bhartendu, Physics(H) 3rd year

    Prashant, physics(H) 1st year

    Lokeh JºkuUn egkfo|ky; (fnYyh fo'ofo|ky;)] vyhiqj] fnYyh&110036

    Swami Shraddhanand College (University of Delhi), Alipur, Delhi-110036

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    INDEX

    Teacher CornerTeacher CornerTeacher CornerTeacher CornerTeacher Corner

    1. Nature, Symmetry and Conservation Laws — Dr. Mukesh Kumar

    2. Mysteries of Outer Space — Dr. Ruby Gupta

    3. 10 Things that Happe to an exposed — Dr. Monica Gambhir

    Humans in Space.

    4. Overview of Rotational Dynamics, — Urvashi Arya

    Orientation and Alignment of molecules

    Almuni SectionAlmuni SectionAlmuni SectionAlmuni SectionAlmuni Section

    5. nm-Scaled motion of charge carriers ————— Vedant Dhaka

    6. Science & Spirituality — Swetank Bharti probed by microwaves

    Student SectionStudent SectionStudent SectionStudent SectionStudent Section

    7. Gravity light — Bhartendu Papnai

    8. Light came second? — DigvijayShighTomar

    9. Pros and cons of nuclear power. — SauravSarkar

    10. Oh Physics! — Ashish Kumar

    11. Einstein life and his achievements. — AnjuDeshwal

    12. Newton’s Biography — Komal Chauhan

    13. Power saver: Can it really help to reduce — VikasBeliwal our electricity bill.

    14. nm-Scaled motion of charge carriers — Vedant Dhaka probed by microwaves.

    15. The Importance of Physics to — Kiran man and Society

    16. Time travel — Prashant Joshi

    17. Terraforming. — Prashant Tyagi

    18. God Particle — Sanjeet Kumar

    19. Vehicle’s Electric Charging System — Sagar Dahiya

  • GRAVITY2013-14 7

    The nature is essential to be considered in the way of promoting human economic growth. Nearly everyone admits the importance of science in understanding natural phenomena . We cannot alter the way nature works, but we can put its laws to our use if we know what they are. The supremacy of nature, to define the natural phenomena is also described in Hindu philosophy viz.

    Bhµumiråpo analo vayu ̈kham mano Buddhireva ca

    Aha≈kårak it∂yam me bhinna prakætirastadhå

    (The laws of Natural sciences do not go beyond the domain of these eight constituents of Nature - Earth,

    Water, Fire, Air, Ether, Mind, Intellect and Ego)

    [Ref. Srimad Bhagwad - Gita : chapter7, verse 4]

    Physical world appears to operate according to certain fixed principles as described. They may be written in terms of words, equations or inequa- lities, but they are all summaries of patterns which have been discovered in nature.

    It was the great achievement of Sir Isaac Newton to find a single set of physical laws which would explain most of the natural phenomena. After Newton one expected much more from a physical theory than that it should fit a limited set of data. It is

    the science of Mechanics which seeks to define the quantities that are vital to the description of motion and discover the laws that govern the motion to establish phenomena.

    The first complete formulation of the physical theory of dynamics was brought by Newton (1642 - 1729) in his famous book, { Philosophiaer Natural’s Principia Mathematica}, probably, the most important single work ever published in the physical science. After Newton, a very wide range of physical theories were developed and elaborated by G.W. Leibnitz (1646-1716),L.Euler (1707- 1783), J.L.Lagrange (1736-1813), S.D.Poisson (1781-1840),C.G.J. Jacobi (1804-1851),W.R. Hamilton (1805-1865), M.Lie (1842-1899), A.E.Noether (1882-1935) and many others. Even now the Newtonian mechanics forms the basis for the description of motion of macroscopic particles like planets.

    Let us study few Natural factLet us study few Natural factLet us study few Natural factLet us study few Natural factLet us study few Natural fact

    • An isolated system of particles can be set into motion in many different ways, no matter how we start the system moving, its

    Dr. Mukesh KumarDr. Mukesh KumarDr. Mukesh KumarDr. Mukesh KumarDr. Mukesh Kumar Assistant Professor in Physics, SSNCAssistant Professor in Physics, SSNCAssistant Professor in Physics, SSNCAssistant Professor in Physics, SSNCAssistant Professor in Physics, SSNC

    ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

    Nature, Symmetry and Conservation Laws

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    energy that remain the same. That energy might characterize the system itself, rather than particular state of motion we choose. The particular from of the energy function contains detailed information about how one configuration of the system developed into another such that the energy retains the initial value.

    • Most of the physical pheno- mena around us are observed to be regular. For example , the sun rises in east and sets in the west, the earth spins about its axis and revolves around the sun etc.

    • The laws of physics are not found to change day by day. For example, energy used in compressing a spring today would be exactly the same as that is recovered by releasing the spring tomorrow.

    • We can express the laws of nature in the form that look the same to all inertial obser-vers, n