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.

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.

(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.

(i) The values displayed by Usha are: dedicated, intelligence, helping nature and awareness:
(ii) Technology: Principle
(a) Aeroplane: Bernoulli's theorem
(b) Rocket propulsion: Newton's second and third laws of motion
(c) Nuclear reactor: Nuclear fission
(d) Optical fibres: Total internal reflection of light

General books on Physics make an interesting reading. Students should consult a good Library to go through some of these immortal works. 'Surely you are joking, Mr. Feynman' by Feynman is one of the books that would assume the students. Some other interesting books are: Physics for the Inquiring Mind by EMRogers; Physics, Foundations and Frontiers by G. Gamow; Thirty Years That Shook Physics by G. Gamow; Physics Can Be Fun by Perelman.

(i) The development on the front of genetic engineering and biotechnology will include:
(a) Production of man, animals and plants with specific characteristics.
(b) High yielding variety of plants and specific crops would be sown.
(ii) Multiple use of laser in various fields or even more developed device which will transform the world. Man would treat himself as the king of universe.
(iii) Man may travel in space with unthinkable speeds and transportation would be totally revolutionised.
(iv) Man would travel deeper into the space and may settle on other planets, befriend strange creatures from other worlds or may wage a war with them.
(v) In the field of communication, 22nd century has many surprises in store. Two persons sitting on the globe or on moon would talk on phone face to face.
(vi) Man may partially conquer diseases and slow down ageing.