Science and Technology Class 9 History Notes Maharashtra Board


Science and Technology Class 9 History Notes Maharashtra State Board

In this chapter, we shall study India’s achievements in the areas of science and technology. Also, we are going to learn about the important institutions in the areas of science and technology and their contribution.

Indian Atomic Energy Commission:
India’s first Prime Minister Pandit Jawaharlal Nehru wanted to nurture a scientific temper and bring about the nation’s progress. From this perspective, he set up the Indian Atomic Energy Commission on 10th August 1948. Dr Homi Bhabha was appointed as the first Chairman of the Commission. The objectives of the commission were to produce electricity from atomic energy, increase the yield of food grains and make them last longer, set up the technology for achieving this, and develop nanotechnology. In 1956, the Department of Atomic Energy set up ‘Apsara’, a nuclear reactor functioning on atomic energy.
Science and Technology Class 9 History Notes Maharashtra Board 1
In 1969, an atomic power station was set up at Tarapur. A Reactor Research Centre was set up at Kalpakkam in Tamil Nadu to successfully use Thorium for generating atomic power. The role of reactors is important in developing atomic power. Factories manufacturing the heavy water needed for the generation of atomic power were set up at Vadodara, Talcher, Tuticorin, Kota, etc. An institution called Heavy Water Projects was set up to research manufacturing heavy water within the country. It was later renamed ‘Heavy Water Board’.

Dhruva Nuclear Reactor:
In 1985, a completely Indian-made nuclear reactor called Dhruva was started at Trombay near Mumbai. The Dhruva nuclear reactor uses uranium as fuel. At this center, 350 radioactive substances are produced. They are used in industry, agriculture, and medicine.

Science and Technology Class 9 History Notes Maharashtra Board

Nuclear Power Corporation of India Ltd. (NPCIL):
This Company was set up in 1987 to generate electricity from atomic energy. The objective of the company is to master and develop the technology to generate safe, cheap, and environmentally profitable power and make the country self-sufficient.

Nuclear Tests

First Nuclear Test at Pokharan:
India successfully performed her first nuclear test at Pokharan in Rajasthan on 18th May 1974 in consonance with the policy of using nuclear energy for peaceful purposes and self-sufficiency. The reason why India took this decision was China’s nuclear capability and Pakistan’s desperate efforts to acquire nuclear weapons with China’s help. Dr Homi Sethna, the chairman of the Indian Atomic Energy Commission, and Dr Raja Ramanna, Director of the Bhabha Atomic Research Centre played a major role in conducting this nuclear test. Prime Minister Indira Gandhi decided against carrying out a ‘nuclear explosion’. Pokharan was chosen based on the required criteria for the location of the nuclear tests: far away from human settlement and no groundwater reserves.
Science and Technology Class 9 History Notes Maharashtra Board 2
In 1974 when India carried out her first nuclear tests at Pokharan, the U.S.A. refused to give India the technology for defence-related fields such as space research, communications, and missile development. As a result, India adopted a policy of developing its missile development program without depending upon the U.S.A. Thus, India joined the ranks of nations like the U.S.A, the U.S.S.R, France, China, and Germany which had their missile programs.
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Second Nuclear Test:
On 11th May 1998, India carried out its second nuclear test to prove its nuclear preparedness. Three tests were done on this day. One of them was the Hydrogen Bomb; Prime Minister Atal Bihari Vajpayee assured that there would be no first use of nuclear weapons by India. However, the USA imposed economic sanctions on India immediately.

Missile Development

In 1988, India successfully tested the missile Prithvi, and in 1989, the missile Agni. The entire world took note of India’s program of developing nuclear missiles indigenously. The Integrated Guided Missile Development Programme (IGMDP) was conceived by and carried out under the leadership of Dr A.P.J. Abdul Kalam. The Defence Research and Development Organisation (DRDO) undertook the task of building the missiles. Prithvi-1, a surface-to-surface ballistic missile was given to the Army, Prithvi-2 was given to the Air Force while Prithvi-3 was given to the Navy. Prithvi could carry nuclear weapons of 500-1000 kg. Prithvi could travel a distance of 150-300 km due to the nuclear ballistic missile.
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In 1958, the Defence Research and Development Organisation (DRDO) was established under the Department of Defence of the government of India. The objective of this organization was to make India self-sufficient concerning means, equipment, and weapons required for defense. After 1983, this organization developed several missiles under the leadership of Dr A.P.J. Abdul Kalam. Dr Kalam has made a great contribution to the production of missiles. Dr. Kalam is known as the father of India’s missile program. He is also referred to as the ‘Missile Man’ of India.

So that China and Pakistan get an idea of India’s missile strength and India’s borders remain secure, Agni-1 was tested. This military missile had a range of 700 km. Later Agni-2 and Agni-3 were also produced.

Akash and Nag Missiles:
In 1990, the missile Akash was developed to fire from land into air. This missile can carry 720-kilogram of explosives at supersonic speed and a range of 30 kilometers. The missile Nag was made to destroy the tanks of the enemy. It is of the ‘fire and forget’ type. India has militarily become secure due to the production of missiles.

Science and Technology Class 9 History Notes Maharashtra Board

Space Research:
In 1961, the Indian National Committee for Space Research (NCSR) launched India’s first research rocket from the Thumba Equatorial Launch Center in Thumba in the State of Kerala. In 1969, our indigenously built rocket Rohini-75 was successfully launched. The next stage was the successful launch of the first Indian satellite Aryabhatta in 1975 with help from the Soviet Union. This success proved that Indian scientists can indigenously build and launch a satellite. Indian scientists were confident that they could acquire the technology for sending a message from the Earth Station and to assess the working of the satellite.

Indian Space Research Organisation (ISRO):
After the success of the basic programme in space research and rocket-related projects, the Indian Space Research Organisation was established on 15th August 1969 to carry out further space research. The headquarters of ISRO is in Bengaluru. ISRO activated the space station at Sriharikota in Andhra Pradesh for launching our satellites in space.

India launched the remote sensing experimental satellite Bhaskar-1 from the Soviet Union in 1979 to observe various things on the surface of the earth by remote sensing technology. This remote sensing technology would be useful for India’s development regarding water bodies, mineral deposits, and forecasting weather. The photographs taken with the help of this technology about the bowels of the earth, environment, and forests were important. Another area in which the information from this satellite was useful was oceanography. In 1981, ‘Bhaskar-2’ was launched by the Soviet Union.

APPLE (Ariane Passenger Payload Experiment):
The first completely indigenously built satellite by ISRO in India, APPLE was launched on 19th June 1981 from the French Guiana. ‘APPLE’ was beneficial in the field of education. The objective of providing emergency telecommunication services was successful.

Indian National Satellite (INSAT):
In August 1983, the satellite INSAT 1-B was launched into space. Because of this satellite, a major revolution came about in the areas of telecommunication, television, radio, weather forecasting, and space research in India. Due to INSAT, 207 Akashwani or Radio stations could be connected. This mechanism was also useful for the search and rescue of people caught in some disaster like a shipwreck or an airplane crash, for forecasting the weather, and for looking for and following cyclones or storms, in the fields of telemedicine and educational institutions. The telemedicine service enabled the population from remote areas to get advice and treatment from expert doctors. Public Primary Health Centers in villages have been connected with superspecialty hospitals through INSAT.

Science and Technology Class 9 History Notes Maharashtra Board

Technological Progress:
A factory manufacturing railway engines, Chittaranjan Locomotive Works was set up at Chittaranjan in Bardwan District in West Bengal. Steam engines, electric engines, and engines running on diesel were manufactured here. The first diesel engine was manufactured at the Diesel Locomotive Works at Varanasi. India started exporting railway engines to Sri Lanka, Bangladesh, Tanzania, and Vietnam.

Telex Service:
The Department of Telecommunications under the Ministry of Communications started the telex service in 1963 to transmit typed messages from one part of the country to another rapidly. In 1969, the telex service started in Devanagari script in Delhi. Later it spread all over the country. This service began to be used in different fields. With the rise of the internet after 1990, the significance of this service was reduced.

Satellite Communication Centre:
To establish satellite communication with the help of an artificial satellite, a domestic satellite communication earth station was established in 1967 at Jodhpur Tekra near Ahmedabad. This made it easy to train scientists and technicians in setting up and running an Earth Station within the country. In 1970, a center was established at Aarvi near Pune, equipped for international telecommunication service.

From 15 August 1972, the Post and Telegraph Department started the six-digit Pincode system in the country. The Postal Index Code was intended to bring efficiency in distributing the mail. In this system, the country was divided into nine regions. The first digit of the Pincode indicates the region, the second digit indicates the Sub-region, the third digit shows the main disbursement district and the remaining three digits show the location of the local post office. For Maharashtra, 40, 41, 42, 43, 44 are the first two digits. In 1986, the speed post service was started to send postage rapidly.

International Subscriber Dialling Telephone Service (ISD):
In 1972, Overseas Communication Service was established in Mumbai for the management of international telecommunication services. In 1976, the International Subscriber Dialled Telephone Service was started to connect Mumbai and London directly by phone. Alongside the telephone service, services like telex, teleprinter, and radio images were started. In 1986, Videsh Sanchar Nigam Limited (VSNL) took a big leap in this field. Before that, Mahanagar Telephone Nigam Limited (MTNL) was a public sector company for provided telephone services in big cities. In the 1990s, Videsh Sanchar Nigam Limited held the distinction of being the main internet service provider in India. The contribution of Sam Pitroda in this field is significant.

On 22nd August 1994, the mobile phone service started in India. At this time a mobile handset cost Rs.45,000 and calling was at 17 per minute. By 1990, many private companies came into this field. This made the service cheaper.

Bharat Sanchar Nigam Limited (BSNL):
In 2000, the telecommunication department was restructured. The responsibility to make policy decisions was retained with the Telecom Department and Bharat Sanchar Nigam Limited was established to provide the services to consumers. Along with the telephone service, cellular phone, internet, and broadband services were also made available.

Science and Technology Class 9 History Notes Maharashtra Board

Oil and Natural Gas Commission (ONGC):
In 1956, the Oil and Natural Gas Commission was established to search for the deposits of mineral oil and natural gas and to increase their production. After Digboi in Assam, mineral oil deposits were found in Ankleshwar area in Gujarat. Later, mineral oil and natural gas deposits were found in the Gulf of Khambhat in Gujarat. In 1974, the Oil and Natural Gas Commission started digging an oil well in ‘The Bombay High area with the help of Russian scientists through a drillship called ‘Sagar Samrat’. From 1975, mineral oil and natural gas began to be extracted from there. Later, more than 8500 oil wells and 33 natural gas wells dug in this area began to contribute 38% of the total mineral oil production in the country and met 14% of the country’s demand for crude oil.

Railways and Technology:
The technology adopted by railways has a big role in the history of modern India. To bring efficiency, accuracy, and coordination to the reservation system in rail travel, a computerized reservation system was started for the first time in Delhi in 1984. In the same year, the Metro was started in Kolkata. In this way, India has been making progress in the fields of science and technology. New inventions have been made. India is an important 21st-century nation, which has always used technology to establish peace in the world. India is making all these advancements to be the foremost among nations in the 21st century.

Konkan Railway:
Konkan Railway started in 1998. There are several records of technology to the credit of Konkan Railway which stretches over the four States of Maharashtra, Goa, Karnataka, and Kerala over a distance of 760 kilometers. There are 12 tunnels on this track. The 6.5 km tunnel at Karbude is the longest. There are 179 big and 1819 small bridges on this track. Out of these, the 2065.8 m long bridge on River Sharavati near Honnawar is the biggest. The 64m tall bridge on River Panvel near Ratnagiri is India’s tallest bridge. To avoid accidents on tracks that are prone to landslides, there are sensors fitted to the railway engines.

Comprehensive Maharashtra State Board Class 9 History Notes Science and Technology can help students make connections between concepts.

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