Nº 5 2015 > Conference overview

The radio spectrum

The radio spectrum is part of the electromagnetic spectrum

The radio spectrum

When we tune our radio, watch TV, send a text message, or cook in a microwave oven, we are using electromagnetic energy. We depend on this energy every hour of the day. Without it, the world we know could not exist. Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays. The human eye can only detect a small portion of this spectrum called visible light. An x-ray machine detects a different portion of the spectrum, and a radio uses yet another portion.



Source: Introduction to the electromagnetic spectrum (NASA)

 

Celebrating ITU’s 150 Years

In this issue
No.6 November | December 2015

Pathway for smart sustainable cities:

A guide for city leaders

Pathway for smart sustainable cities|1

Meeting with the Secretary-General:

Official Visits

Meeting with the Secretary-General|1
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Boosting “SMEs” for ICT growth

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By Silvia Guzmán, Chairman, ITU Focus Group for Smart Sustainable Cities