(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

(I) Deepa's uncle is not educated and he is comparing the period of his early life when he could no have communication system, computers, LED's and LCDs. etc. with his present period.
(ii) Sympathy, helping, awareness and intelligence are the values displayed by Deepa.
(iii) Names of Indian Scientists are:
(a) H.J. Bhaba
(b) S.N. Bose
(c) CV. Raman
(d) J.C Bose

No, it is not true. Physics has unlimited scope and its conceptual base can be noticed in immense number of activities/ fields. Can a cricket or a hockey player say that physics has nothing to do with his game? No, he is using collision phenomenon every second of his game along with Newton's laws of motion. Can you say that you walk without physics, talk without physics, eat without physics and so on, all that need friction. A musician uses physics. Physics is applied in every walk of life. Therefore we can not say that physics is noticed only in the practice of few blessed ones.

By unification we mean explanation of diverse physical phenomena in terms of a few concepts and laws. As an example, the law of gravitation describes the motion under gravity, motion of Moon and satellites as well as motion of planets. Again, Maxwell's equations of electromagnetism govern all electric and magnetic phenomena.
By reductionism approach we try to derive the properties of a bigger, more complex, system from the properties and interactions of its constituent simpler parts. As an example thermodynamics deals with bulk systems in terms of macroscopic quantities like temperature, internal energy, entropy etc. The kinetic theory and statistical mechanics interpreted these quantities in terms of the properties of the molecular constituents of the bulk system.

Progress in the field of science and technology is interrelated. Sometimes technology gives rise to new physics and at other times physics generates new technology. The discipline of thermodynamics arose mainly to understand and improve the working of heat engines. Similarly discovery of basic laws of electricity and magnetism led to development of wireless communication technology. Therefore, we can conclude that physics and technology are closely related.

The most important discoveries of physics, which have contributed in development of Biology are:
(i) Ultrasonic waves.
(ii) X-rays and neutron diffraction technique
(iii) Electron microscope.
(iv) Radio isotopes.

Four fundamental forces present in nature are:
(i) Gravitational force
(ii) Electromagnetic force
(iii) Weak nuclear force
(iv) Strong nuclear force.

The end of 20th century is a witness of the intricate relation between science and society. If one can say that it has entered the nerves of the society, it will not be an exaggeration. Even the marriages are being fixed on internet and celebrated in aeroplanes. Think of discos. You can make images of criminals by computers apart from host of other activities like reservation, animation, designing, printing etc. These effects on society are in addition to the ones which revolutionized and societies by mechanical revolution of first half of the 20th century like X-rays, nuclear energy, wireless, satelite, electronics, computer and robots

Three important discoveries of physics, which have revolutionised modem chemistry, are:
(i) study of radioactivity.
(ii) quantum theory
(iii) study of isotopes and determination of their masses by mass spectrographs.

The microscopic domain of physics deals with the constitution and structure of matter at atomic and nuclear scale.
The quantum theory is currently accepted as the proper framework for explaining microscopic phenomena.

According to Einstein
(i) Mass and energy are interconvertible.
(Ii) Space and time are interconnected.

The statement" scientists, like any other group of humans, have their share of humorists" is true. We can cite the example of many scientists who were fun loving, adventurists, jovial. One can add the name of C.V. Raman who enjoyed music in addition to doing serious scientific works and so was Homi Jahagir Bhaba. Students should go through the listed books of bibliography to visualise actual image of science and scientists. (see our website.)

The explanation given in option (b) strikes as a scientific explanation.

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.

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.