The Science of Physics Chapter 1 Review Answers
NCERT Solutions Class 11 Physics Chapter 1 Physical World is ane of the nigh effective tools to practise Physics for the 11th standard term – I examination. The NCERT Solutions for Class 11 Physics Chapter 1 Physical World of the first term will aid students to go familiar with the test blueprint and the syllabus of the term – I examination. Before understanding more complex theories in Physics, we volition be going through the matters and materials effectually the world, where the laws of physics are beingness applied by nature.
Physics consists of both concepts and problems as per the latest update of term-wise CBSE Syllabus 2021-22. In society to score well in the first term exam, students are highly recommended to apply the NCERT Solutions while answering the questions from the textbook. The chapter-wise solutions are provided here in a PDF format which tin can be downloaded by the students free of toll.
1.i Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all fourth dimension. What practise yous think did Einstein mean when he said: "The most incomprehensible thing nearly the world is that it is comprehensible"?
Ans:
The circuitous concrete world involves dissimilar orders of magnitudes in space, time and mass. Despite this, nearly all physical phenomena can be expressed in terms of a few basic laws. By this view, Einstein'due south argument "The most incomprehensible matter most the world is that it is comprehensible" becomes very clear.
1.2 "Every great physical theory starts as a heresy and ends as a dogma". Requite some examples from the history of the science of the validity of this incisive remark.
Ans:
One of the general observations in our daily life is that calorie-free travels in a direct line. When Huygens propounded his moving ridge theory, it was a heresy. However, soon it became dogma as interference patterns, refraction etc. could be successfully explained on the footing of wave theory.
Information technology was believed that light was only energy simply when the photoelectric consequence was discovered it was proposed that light had a particle nature too, this was profoundly debated and treated equally heresy. However, Einstein finally proved it with his quantum theory of light. Henceforth, it has been treated equally a dogma.
i.3 "Politics is the art of the possible". Similarly, "Science is the art of the soluble". Explain this beautiful aphorism on the nature and practise of science
Ans:
Politicians make annihilation and everything possible to win votes. Science is a systematized study of observation. Scientist and researchers study these observations so piece of work out sure laws from them. There is a multitude of natural phenomena taking place in this universe and all of them can be explained in terms of some basic laws. For eastward.g. F = mg is true for you and me and also for a star. Thus, in science we encounter that diverse phenomena are related, they are soluble and tin can be explained with similar or the same law. This goes on to justify that science is the art of the soluble just as politics is the art of the possible.
i.4 Though Bharat now has a large base in science and applied science, which is fast expanding, information technology is even so a long manner from realising its potential of condign a world leader in science. Proper noun some important factors, which in your view take hindered the advocacy of science in India.
Ans:
Hither are some of import factors that have obstructed the growth of science in India:
- Lack of infrastructure and funds for quality enquiry work in science.• Poor pay scales and other facilities to scientists as compared to administrators.
- Science teaching is neither properly oriented nor directed. It needs specific directions depending on our requirements. The industrialists are the actual consumers of new engineering science and enquiry. The industrialists of this country have little confidence in the ability of Indian scientists. At that place is practically no co-ordination betwixt the researchers and the industrialists.
- Rural-based science education is most non-real and then that majority of the population is deprived of the benefits of advancements in technology and science.
1.five No physicist has always "seen" an electron. Yet, all physicists believe in the existence of electrons. An intelligent but superstitious man advances this analogy to argue that 'ghosts' exist even though no 1 has 'seen' one. How will you refute his argument?
Ans:
Fifty-fifty though an electron has never been 'seen' but its furnishings have been observed and its practical evidence have been tested and proved. E.g. electricity. However, regarding spirits and ghosts, even though there are many claims and sightings, standardized scientific reading and evidence take never been observed or successfully tested. Thus, nosotros really cannot state with a cent per cent surety that they exist.
1.6 The shells of crabs constitute around a item littoral location in Nippon seem mostly to resemble the legendary confront of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation?
(a) A tragic body of water accident several centuries agone drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face past imprinting it on the crab shells in that expanse.
(b) After the sea tragedy, fishermen in that area, in a gesture of honor to their dead hero, allow free whatsoever crab shell caught by them which accidentally had a shape resembling the confront of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in form of time the shape was genetically propagated. This is an example of evolution by artificial selection.
[Annotation: This interesting illustration is taken from Carl Sagan'southward 'The Cosmos' highlights the fact that frequently foreign and inexplicable facts which on the first sight appear 'supernatural' actually plow out to have simple scientific explanations. Attempt to call back out other examples of this kind].
Ans:
(a) More logical and scientific.
i.seven The industrial revolution in England and Western Europe more than ii centuries ago was triggered by some key scientific and technological advances. What were these advances?
Ans:
The rise of modernistic Scientific discipline and industrial revolution are closely connected to each other. The other profound impact issue that Science had on the development of modern science is that the application of Science to solve the industrial bug garnered public support and interest in Scientific discipline.
Some of the key discoveries and their uses are listed below:
- The application of thermodynamics and heat to course the steam engine are some of the central advances in Science and technology during the period of the industrial revolution.
- Implementation and discovery of electricity helped in the invention of motors and dynamos. Likewise, the study of gravitation led to the written report of movement which farther led to the development of cannons and guns. This invention gave ability in the easily of western countries and they ruled over the residuum of the world.
- The discovery of explosives not just helped the ground forces but too helped in mineral exploration.
These were a few examples of scientific breakthroughs that helped England and Europe to have their prominent positions in the world.
1.8 It is often said that the world is witnessing now a second industrial revolution, which volition transform the social club every bit radically as did the kickoff. List some primal contemporary areas of Science and engineering science, which are responsible for this revolution.
Ans:
Some key contemporary areas of engineering science and Science, which are chiefly responsible for a new industrial revolution taking place at present and probable to accept place in the near futurity are:
- Artificial intelligence
- Pattern of super-fast computers.
- Biotechnology
- Development of superconducting materials at room temperature.
- Advancements in the field of
→ Electronics
→ It
→ Nanotechnology
→ Developments in the field of Infinite Sciences
1.9 Write in nearly chiliad words a fiction piece based on your speculation on the Science and engineering of the twenty-2nd century.
Ans:
In the 22nd century, humans will be able to create wormholes allowing people to travel to distant places in the universe. Nosotros volition be in contact with aliens and take established human settlements outside the world likewise. With advancements in quantum Physics we shall be more enlightened and agreement of the truthful nature of our universe and beingness. Our technologies will not pollute and degrade earth. Artificial intelligence and humans could have some clashes.
1.10 Endeavor to formulate your 'moral' views on the do of Science. Imagine yourself stumbling upon a discovery, which has corking bookish interest but is certain to have nada merely dangerous consequences for human social club. How, if at all, will you resolve your dilemma?
Ans:
A scientist works for the truth. Every scientific discovery reveals a certain truth of nature. So, any discovery, bad or good for flesh, must be made public.
But with that existence said, we cannot afford to be blind to consequences. Earlier disclosing it we must define the caste of skilful or bad consequences information technology volition have. If nosotros know that a certain discovery has null but dangerous consequences to offer to the mass, the discovery is best kept express but to the noesis of the scientist and researches working on it. This way the discovery can help societies in the long run without completely destroying it now.
1.11 Science, like whatever knowledge, tin exist put to expert or bad use, depending on the user. Given below are some of the applications of science. Formulate your views on whether the detail application is good, bad or something that cannot exist and then clearly categorised :
(a) Mass vaccination confronting smallpox to adjourn and finally eradicate this disease from the population. (This has already been successfully done in India).
(b) Tv for the eradication of illiteracy and for mass advice of news and ideas.
(c) Prenatal sex determination
(d) Computers for the increase in work efficiency
(due east) Putting artificial satellites into orbits effectually the Globe
(f ) Development of nuclear weapons
(m) Development of new and powerful techniques of chemic and biological warfare).
(h) Purification of water for drinking
(i) Plastic surgery
(j ) Cloning
Ans:
(a) Good. Mass vaccination helped eradicate the dreaded diseases from the Earth.
(b) Good. Goggle box helps in the literacy campaign and is an effective method of mass communication and entertainment.
(c) Bad. Prenatal sexual practice determination is considered bad considering it gives ascent to the practice of ballgame in the case of the female foetus.
(d) Skillful. Figurer increases work efficiency.
(e) Good. Artificial satellites assist in the worldwide communication process.
(f) Bad. Nuclear weapons if misused may cause mass destruction of flesh.
(g) Bad. These techniques may be misused for destructive purposes.
(h) Good. Purified h2o improves the health of people.
(i) Neither good nor bad. Plastic surgery is something which can't be classified every bit either practiced or bad because it helps to remove a certain type of deformations in needy persons.
(j) Bad. Cloning has the potential to ruin the normal family life of human club.
i.12 Bharat has had a long and unbroken tradition of great scholarship — in mathematics, astronomy, linguistics, logic and ethics. Nonetheless, in parallel with this, several superstitious and obscurantist attitudes and practices flourished in our guild and unfortunately continue even today — among many educated people too. How will you utilize your knowledge of science to develop strategies to counter these attitudes?
Ans:
In order to popularize scientific explanations of everyday phenomena, mass media like
→ Net
→ Newspapers
→ Television
→ Radio
should be used. Knowledge of Science should exist educated to the masses so that they learn about the real causes of phenomenon allowing their superstitious behavior to wash away.
1.13 Though the law gives women equal status in India, many people concord unscientific views on a woman'southward innate nature, capacity and intelligence, and in practice give them a secondary status and function. Demolish this view using scientific arguments, and past quoting examples of keen women in science and other spheres; and persuade yourself and others that, given equal opportunity, women are on par with men.
Ans:
No difference is noticed in the power of women and men equally far every bit work, intelligence, decision making is concerned. Nature makes footling difference in the anatomy and feeling of men and women. The diet content of prenatal and postnatal diet contributes a lot towards the development of a homo body. If equal opportunities are provided to both women and men, and then the female mind and body will be just equally efficient as a homo'south. The listing of neat women who accept excelled in their respective fields is enormous. Names of
→ Madame Curie
→ Indira Gandhi
→ Florence Nightingale
→ Margaret Thatcher
→ Mother Teresa,
→ Sarojini Naidu
→ Kalpana Chawla
been taken from fields varying from Sociology to Science and they all very well-known for their contribution to the globe. Reflecting the contribution beingness made to each and every sphere of life in the state, it can be positively debated that women are no less essential to society than men.
1.14 "It is more important to have beauty in the equations of Physics than to accept them agree with experiments". The great British physicist P. A. Yard. Dirac held this view. Criticize this statement. Look out for some equations and results in this book which strike you lot equally beautiful.
Ans:
Dirac's belief holds true. Equations which represent entire concepts and hold upwardly against experimental results are automatically uncomplicated, modest and symmetrical, making them truly beautiful. Some examples of beautiful equations are:
E = mctwo , Eastward = hv, F = mg, P.Due east = mgh.
NCERT Solutions for Class eleven Physics Chapter one
NCERT Solutions provided here present you with answers to the textbook questions along with extra questions, NCERT Exemplar problems with solutions, worksheets, MCQs and short respond questions. Solving these questions volition help yous to fix notes and to understand the concept thoroughly.
Nosotros will be seeing here how things piece of work and the reasons backside their workings. Equally Einstein one time said, "Imagination is more than important than noesis", this chapter volition make yous aware of the things that environs you lot, the history of Science and its origin. We will be seeing a lot of aphorism below and reasons to justify them with real-life Physics concepts. We volition be relating ourselves with the theories and observations done by many scientists and deriving conclusions from them.
We will be getting acquainted with the factors responsible for the growth of Scientific discipline and engineering in Bharat. The existence of an electron has been discussed in this chapter along with scientific resemblance of a crab species with that of a Japanese samurai. Nosotros volition be glancing at histories similar the industrial revolution of Western Europe and England which was two centuries ago. We will be seeing the significant areas of science and technology responsible for the current revolution.
We will also be writing a fictional article about the speculation of Science and engineering science in the 22nd century. We will piece of work on moralising our views on science and the consequences of practising Scientific discipline. Nosotros will ask yous to give your opinions about certain applications and processes of Science, whether it was helpful or not for the betterment of human civilisation. Nosotros volition be focusing on the history of India and the superstitious practices and attitudes followed past Indians. You can check out NCERT Solutions for Class 11 Physics for more chapter-wise solutions.
We will exist talking about the police force behind people having irrational ideas most women's intelligence, capacity and nature and about giving them a status forth with the part of technology in the development of society. We will let y'all express your judgements on the statement provided by Physicist P.A.Chiliad. Dirac and we volition as well be knowing some cute equations of physics. Nosotros accept heard nearly the adventures of scientists and many more outgoing individuals who have climbed alpine mountains to tape temperatures and even dived deep to collect information regarding the flora and fauna. Nosotros will exist seeing below various questions on the in a higher place-mentioned topics.
The NCERT Solutions for Class eleven Physics Affiliate ane is prepared by expert subject field teachers in such a way that information technology covers all the concepts of the topic. Check the NCERT Solutions for Class xi Physics Affiliate 1 PDF.
BYJU's brings you NCERT study materials, notes, previous year question papers, Physics problems and sample papers. These report material are prepared every bit per the latest term-wise CBSE Syllabus 2021-22. For more information register with BYJU'S or download the BYJU'South App for a personalised learning experience.
Important Concepts of NCERT Solutions for Class xi Physics Chapter 1
Students who are non able to answer the questions from the textbook are brash to refer to the NCERT Solutions for Course 11 Physics from BYJU'Southward. A highly experienced fix of kinesthesia creates the solutions in accord with the latest term – I CBSE Syllabus 2021-22 and its guidelines. Some of the of import concepts covered in Affiliate one are –
1.i WHAT IS PHYSICS?
i.2 Telescopic AND EXCITEMENT OF PHYSICS
1.3 PHYSICS, TECHNOLOGY AND SOCIETY
1.4 Fundamental FORCES IN NATURE
i.4.i Gravitational Strength
1.4.2 Electromagnetic Force
1.four.3 Strong Nuclear Forcefulness
1.4.4 Weak Nuclear Force
i.4.5 Towards Unification of Forces
one.v NATURE OF PHYSICAL LAWS
Frequently Asked Questions on NCERT Solutions for Class 11 Physics Chapter 1
How do NCERT Solutions of Form xi Physics Chapter 1 Concrete World help in the first term exam preparation?
The questions provided in NCERT Solutions of Class 11 Physics Chapter 1 Physical World can offer an splendid heave to study thoroughly and score excellently during the first term examinations and tests. Students can effectively get-go practising NCERT Solutions Class xi Physics, which will lead to an immeasurable performance in further studies. This, in turn, would build a potent grip on the first term'south syllabus.
Is BYJU'S providing answers for NCERT Solutions for Grade 11 Physics Chapter 1?
Yes, BYJU'Southward website provides accurate and detailed solutions for all questions provided in the NCERT Textbook. BYJU'South brings you NCERT Solutions for Class eleven Physics, designed by our subject experts to facilitate shine and precise understanding of concepts. These solutions accept detailed pace-by-stride explanations of problems given in the NCERT Textbook. The NCERT Solutions for Class xi Physics Chapter one can be downloaded in the grade of a PDF and students can employ it as a reference tool to quickly review all the topics.
List out the of import concepts discussed in NCERT Solutions for Class 11 Physics Affiliate 1.
The primary concepts covered in NCERT Solutions for Class 11 Physics Affiliate i are we will be going through the matters and materials effectually the world, where the laws of Physics are being applied by nature.
1.i WHAT IS PHYSICS ?
1.two Telescopic AND EXCITEMENT OF PHYSICS
one.iii PHYSICS, TECHNOLOGY AND SOCIETY
1.4 Fundamental FORCES IN NATURE
1.iv.one Gravitational Forcefulness
one.4.ii Electromagnetic Force
1.4.iii Strong Nuclear Strength
1.4.4 Weak Nuclear Force
1.4.five Towards Unification of Forces
1.five NATURE OF Concrete LAWS
Source: https://byjus.com/ncert-solutions-class-11-physics/chapter-1-physical-world/
0 Response to "The Science of Physics Chapter 1 Review Answers"
Post a Comment