The industrial revolution in England and Western Europe more than two centuries ago was triggered by some key scientific and technological advances.
A few of which are given below
(i) Discovery of electricity
(ii) Invention of powerloom, safety lamp, cotton gin, steam engine, etc.

It is true that no physicist has ever seen an electron but several phenomena taking place in our daily life give us evidence of the existence of the electron such as frictional electricity.
On the other hand, no one has ever seen ghosts but there is no phenomena which can be explained on the basis of the existence of ghosts. Therefore, there is no comparison between two cases.

Few important factors which have hindered the advancement of science in India are given below
(i) Poverty, due to which there is a lack of resources and infrastructure
(ii) Poor management of science education
(iii) Lack of scientific planning
(iv) No coordination between researchers and industrialists

The statement of great British physicist PAM Dirac is partially true.
e.g. F = ma, E = mc² are some of the simple and beautiful equations of physics which have universal application.
However, this is not the case always. The equations involved in general theory of simple nor beautiful. They are rather difficult to understand.

It is well known that to win over votes, politicians would make anything and everything possible even when they are least sure of the same. That is why, we say that politics is the art of possible.
The statement that science is the art of the soluble implies that a wide variety of physical phenomena are understood in terms of only a few basic concepts, i.e. there appears to be unity in diversity as if widely different phenomena are soluble in a few theories and can be explained in terms of only a few fundamental laws.

The statement is true, e.g. in ancient times, Ptolemy postulated that earth is stationary and all the heavenly bodies like sun, stars, planets etc., revolve around earth. Later, an Italian scientist, Galileo postulated that sun is stationary and earth along with other planets is revolving around the sun.
Galileo was punished by the authorities for spreading wrong concepts. However, later on. Newton and Kepler supported Galileo's theory and now it is no more than a dogma.

The physical world, when seen by a layman, presents us with such a wide diversity of things. It seems incomprehensible, i.e. as if it cannot be understood.
On study and analysis, the scientists find that the physical phenomena from atomic to astronomical ranges can be understood in terms of only a few basic concepts, i.e. the physical world becomes comprehensible. This is what is meant by Einstein's statement made above.

There is no difference in the capacity of the woman in taking good and quick decisions, in doing hard work and intelligence.
The development of human brain depends on the nutrition contents of prenatal and postnatal diet and it does not depend a man can also be achieved by a woman
In every field of life, woman has proved herself. Madam curie, a Physicist, won Nobel prize.
Mother Teresa was a great saint, Kalpana Chawala an astronomer, Mrs. Indira Gandhi, Marget Thacher, Lata Mangeskar etc., are well known personalities in different fields. Therefore, the woman should be given equal opportunity at par with men.

Illogical practices, superstitious attitudes which are still flourishing in our society can be removed only by educating the society
Mass media like radio, TV, newspaper, magazine etc, can play a vital role in it. Programmes should be framed to target these illogical practices.

Science is a search of truth. Each discovery, either it is good or bad for our society should be made public. The reason is that a discovery, which appears bad or dangerous today for our society may be useful for us later on.
We should make public aware about misuse of discoveries and technologies. e.g., nuclear fission can be used in developing atom bomb also.

Imagine you along with your friends are in a spaceship which is moving towards Mars. The body of the speceship is made of a specially designed matter which become more harder as its temperature increases. nuclear power plants in spaceship.
Two of them work alternatively and third is for emergency. The speed of the spaceship is very high and all of you are very happy. The energy produced in power plants are converted into electric energy which runs the motors of the spaceship.
You along with your friends reach safely on Mars, collects data, takes photographs and then returns to the Earth. In return journey is working and due to overheating. its efficiency is decreasing continuously.
You and your friends try to reduce the temperature of the plant and try to repair the fuse of the other power plants.
Finally, fuse of one other plant is repaired and start to work before the first plant crosses the danger limit of an excess of temperature. Finally, you and your friends return safely on Earth.

Some of the key areas which will transform radically the present society are given below
(i) Discovery of laser will bring a revolution in the field of communication as a laser beam can transmit thousands of signals simultaneously. It can be used in bloodless surgery in curing eye tumours etc.
(ii) Development of superconducting materials at room temperature will bring a revolution in the field of supercomputers, electromagnets, transmission of electric power etc.
(iii) Development of biotechnology
(iv) Development of satellites.

(i) Mass vaccination is good as, it is used to make the socity free from the diseases like small pox.
(ii) Television for eradication of illiteracy and for mass communication of news and ideas is good as, it is a medium which is easily within the reach of common man and also they are very habitual to it.
(iii) Prenatal sex determination is bad because people are misusing it. Some of the people after determination of sex of child, think to abort. They do it especially with girl child.
(iv) Computer for increase in work efficiency is good as using the computer, a man can do much more work with greater efficiency and accuracy.
(v) Putting artificial satellite into orbits around the Earth is good for development as these satellites serve many purpose like remote sensing, weather foresting.
(vi) Development of nuclear weapons is bad as they can be used in mass destruction.
(vii) Development of new and powerful tool of chemical and biological warfare are bad, as they can also be used for mass destruction.
(viii) Purification of water for drinking purpose is good as we can save ourself from the diseases which we can have due to drinking of the water.
(ix) Plastic surgery is good as with the help of it a man or women can remove the skin defects occurring due to accident or some other reasons. It has some bad effects too but they are not very considerable.
(x) Cloning is good as far as animals are concerned. With the help of it, we can develop some species of animals which can be used to serve some specific purpose. But it is not good for human beings.