2 Science and Technology · 2.2.1 Computers, communication and Digital India

2.2.1.2 Telecom: 1G to 5G, optical fibre, satellite internet, Li-Fi and BharatNet

Mobile networks moved from analogue voice (1G) to 5G (launched in India on 1 October 2022); optical fibre carries data as light, Li-Fi uses LED light, and BharatNet is the government's village broadband fibre project.

  • APPSC Group 1
  • Advanced level
  • 5 min read
  • Full course

Key terms

  • 1G
  • 2G
  • 3G
  • 4G
  • 5G
  • 6G
  • spectrum
  • optical fibre
  • total internal reflection
  • Kapany
  • Li-Fi
  • BharatNet
  • satellite internet
  • Telecommunications Act 2023
  • TRAI

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. AP angleStandard
  5. Mains writingMains writing
  6. Common trapsFoundation
  7. Quick revisionFoundation

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