In 1839, the ability of some materials to create an electrical charge from light exposure was first observed by Alexandre-Edmond Becquerel. Though the premiere solar panels were too inefficient for even simple electric devices they were used as an instrument to measure light. The observation by Becquerel was not replicated again until 1873, when Willoughby Smith discovered that the charge could be caused by light hitting selenium. After this discovery, William Grylls Adams and Richard Evans Day published "The action of light on selenium" in 1876, describing the experiment they used to replicate Smith's results.
The earliest literature in India, composed between 1500 BCE and 1200 CE, was in the Sanskrit language. Major works of Sanskrit literature include the Rigveda (c. 1500 BCE – 1200 BCE), the epics: Mahābhārata (c. 400 BCE – 400 CE) and the Ramayana (c. 300 BCE and later); Abhijñānaśākuntalam (The Recognition of Śakuntalā, and other dramas of Kālidāsa (c. 5th century CE) and Mahākāvya poetry. In Tamil literature, the Sangam literature (c. 600 BCE – 300 BCE) consisting of 2,381 poems, composed by 473 poets, is the earliest work. From the 14th to the 18th centuries, India's literary traditions went through a period of drastic change because of the emergence of devotional poets like Kabīr, Tulsīdās, and Guru Nānak. This period was characterised by a varied and wide spectrum of thought and expression; as a consequence, medieval Indian literary works differed significantly from classical traditions. In the 19th century, Indian writers took a new interest in social questions and psychological descriptions. In the 20th century, Indian literature was influenced by the works of the Bengali poet and novelist Rabindranath Tagore, who was a recipient of the Nobel Prize in Literature.
More InfoAccording to the International Monetary Fund (IMF), the Indian economy in 2019 was nominally worth $2.9 trillion; it is the fifth-largest economy by market exchange rates, and is around $11 trillion, the third-largest by purchasing power parity, or PPP. With its average annual GDP growth rate of 5.8% over the past two decades, and reaching 6.1% during 2011–2012, India is one of the world's fastest-growing economies. However, the country ranks 139th in the world in nominal GDP per capita and 118th in GDP per capita at PPP. Until 1991, all Indian governments followed protectionist policies that were influenced by socialist economics. Widespread state intervention and regulation largely walled the economy off from the outside world. An acute balance of payments crisis in 1991 forced the nation to liberalise its economy; since then it has moved slowly towards a free-market system by emphasising both foreign trade and direct investment inflows. India has been a member of WTO since 1 January 1995.
More InfoIndia is home to two major language families: Indo-Aryan (spoken by about 74% of the population) and Dravidian (spoken by 24% of the population). Other languages spoken in India come from the Austroasiatic and Sino-Tibetan language families. India has no national language. Hindi, with the largest number of speakers, is the official language of the government. English is used extensively in business and administration and has the status of a "subsidiary official language"; it is important in education, especially as a medium of higher education. Each state and union territory has one or more official languages, and the constitution recognises in particular 22 "scheduled languages".
More InfoIndia is home to two major language families: Indo-Aryan (spoken by about 74% of the population) and Dravidian (spoken by 24% of the population). Other languages spoken in India come from the Austroasiatic and Sino-Tibetan language families. India has no national language. Hindi, with the largest number of speakers, is the official language of the government. English is used extensively in business and administration and has the status of a "subsidiary official language"; it is important in education, especially as a medium of higher education. Each state and union territory has one or more official languages, and the constitution recognises in particular 22 "scheduled languages".
More InfoIndia is home to two major language families: Indo-Aryan (spoken by about 74% of the population) and Dravidian (spoken by 24% of the population). Other languages spoken in India come from the Austroasiatic and Sino-Tibetan language families. India has no national language. Hindi, with the largest number of speakers, is the official language of the government. English is used extensively in business and administration and has the status of a "subsidiary official language"; it is important in education, especially as a medium of higher education. Each state and union territory has one or more official languages, and the constitution recognises in particular 22 "scheduled languages".
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