Telecom, Radio waves, TSPs - GS questions based on daily current affairs

1)   Radio Waves have wavelength ranging from

a. 100km to 1000km
b. 1mm to 100km
c. 0.1mm to 1mm
d. 1nm to 1mm
Answer  Explanation 

ANSWER: 1mm to 100km

Explanation:

  • Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies from 300 GHz to as low as 3 kHz.
  • Corresponding wavelengths ranging from 1 millimeter to 100 kilometers.
  • Like all other electromagnetic waves, they travel at the speed of light. Naturally occurring radio waves are made by lightning, or by astronomical objects.
  • Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications.