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Choose the waves relevant to telecommunications.

AUltra violet

BVisible rays

CMicro Waves

DInfra red

Answer:

C. Micro Waves

Read Explanation:

  • Radio waves, microwaves, infrared and visible light can all be used for communication.

  • Radio waves – are used to transmit television and radio programs.

  • Microwaves – are used to transmit satellite television and for mobile phones.

  • Infrared – is used to transmit information from remote controls.

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Which file has minimum space between their teeth?
Which particle is popularly named as god particle ?
പ്രതിദീപ്‌തിയിൽ പുറത്തുവിടുന്ന പ്രകാശം സാധാരണയായി ഏത് സ്പെക്ട്രത്തിലാണ് കാണപ്പെടുന്നത്, ആഗിരണം ചെയ്യപ്പെടുന്ന വികിരണം ഏത് പരിധിയിലാണ് വരുന്നത്?

Which of the following statements are correct?

  1. (a). For a lens the first principal focus is the position of the object whose image is at infinity
  2. (b) For a lens the first principal focus is the position of the object whose image is formed at twice the focal length.
  3. (c) For a lens the second principal focus is the position of the real image whose object is at infinity
  4. (d) For a lens the second principal focus is the position of the object whose image is formed at twice the focal length
    Choose the semiconductor from the following: