Inventions That Shook the World YouTube Video Overview: https://www.youtube.com/

Question

Inventions That Shook the World

YouTube Video Overview: https://www.youtube.com/watch?v=82Oh6xJ25U0

From the airplane to the DNA fingerprint, science, history and pop culture come under the spotlight in this thrilling chronicle of the 20th Century's greatest inventions. Go on a decade-by-decade voyage of discovery through life-changing inventions; like the radio that made the world smaller; the machine gun that made it more dangerous; or the parking meter that made it more expensive. Meet the brilliant, often quirky minds that brought the inventions to life, including the smartest man on the planet and the high school dropout everyone took for a fool. Witness the discovery and creation of billion-dollar inventions and financial disasters - all players in the most innovative century the world has ever known.

In your opinion, out of all the scientists you have explored in your knowledge and video (inventions that shocked the world, choose a single scientist that made the most impact on your lives. Please concentrate on the person, not on the discovery.

Explanation / Answer

Earth science is a science that deals with the study of earth and the atmosphere. from a geologist point of view ,out of all the scientists I have explored , the person who invented the use of waves for sound , is an shocking invension. Radio is the radiation i.e wireless transmission of electromagnetic energy through space.The biggest use of radio waves is to carry information, such as sound, 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.

Radio systems need a transmitter to modulate (change) some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation (which can be frequency modulation or phase modulation). Radio systems also need an antenna to convert electric currents into radio waves, and vice versa. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected. The electromagnetic wave is intercepted by a tuned receiving antenna. A radio receiver receives its input from an antenna and converts it into a form usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 3 kHz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.

A radio communication system sends signals by radio.The radio equipment involved in communication systems includes a transmitter and a receiver, each having an antenna and appropriate terminal equipment such as a microphone at the transmitter and a loudspeaker at the receiver in the case of a voice-communication system.

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