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What is the least frequency?

In the electromagnetic spectrum the lowest frequency range is 300 GHz to 3 kHz and these are known as radio waves.You can read about LIGO India – Gravitational Wave Detector in India in the given link.

Further readings:

  1. Topic-Wise GS 3 Questions for UPSC Mains
  2. Science & Technology Notes For UPSC – General Science Notes 

Related Links

Gravitational Waves: UPSC Notes for Science and Technology

Photon – Origins, Properties and Applications (UPSC Notes)

European X-Ray Free Electron Laser

Electromagnetic Waves (EM Waves): Notes for UPSC

UPSC Mains General Studies Paper-III Strategy, Syllabus & Structure

Rayleigh Waves And Love Waves

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