Ravinder and Mohender were discussing the role of Physics in society. Ravinder said to Mahender that Physics does not have any impact on society. He had no knowledge of science as he was the student of Arts stream. Ravinder who is the science student of class XII explained him that the fate of society is intimately linked with Physics because whatever is discovered in Physics, it immediately effects the society. The advancement in the field of communication such as radios, computers, TVs and mobile phones connect the people with each other. Nuclear energy have brought a profound change in the thinking and living style of the human beings.
(i) What values are displayed here by Ravinder?
(ii) Give any five discoveries which has effected the society more.

Deepa's uncle was surprised to see the fast changes in the world. He is not so educated. He asked Deepa to tell him the names and qualities of some persons who have contributed for bringing the rapid changes in the world. Deepa who is science graduate explained about some discoveries and the names of scientist who have done a marvellous work in physics.
(i) Why Deepa's uncle was so curious to know things changed recently?
(ii) What values are displayed by Deepa?
(iii) Name at least three Indian scientists.

Usha and Ritu are two sisters. Usha wants to explain some technologies to Ritu. Initially, Ritu did not show any interest in knowing about the technologies. But Usha explained about the uses and application of some important discoveries.
(i) What values are displayed by Usha?
(ii) Name some technologies and related principles.