- published: 15 Oct 2015
- views: 4311767
CBC may refer to:
Radio is the transmission of signals through free space by electromagnetic waves with frequencies significantly below visible light, in the radio frequency range, from about 3 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
The etymology of "radio" or "radiotelegraphy" reveals that it was called "wireless telegraphy," which was shortened to "wireless" in Britain. The prefix radio- in the sense of wireless transmission, was first recorded in the word radioconductor, a description provided by the French physicist Édouard Branly in 1897. It is based on the verb to radiate (in Latin "radius" means "spoke of a wheel, beam of light, ray").
#CBCEgy_Live - CBC Live Stream | البث المباشر لقناة سي بي سي
Teacher discipline: What can parents find out about teachers? (CBC Marketplace)
The Unmaking of the CBC
Racial profiling by stores, landlords and companies: Are we racist? (CBC Marketplace)
CBC News Edmonton, Fort McMurray special, May 5th, 2016
Outlets vs retail, and Winners prices: Sale fail? (CBC Marketplace)
What are the best eggs? Egg crackdown (CBC Marketplace)
#CBCExtra_Live - CBCExtra Live Stream | البث المباشر لقناة سي بي سي أكسترا
CBC News Special: Face To Face with the Prime Minister
Tow truck tricks: Don't get scammed after an accident (CBC Marketplace)