Lesson Notes By Weeks and Term - Senior Secondary School 1

CLASS: SSS 1

SUBJECT: DATA PROCESSING

TERM: 2^ND TERM

WEEK FOUR                                                                         DATE: ………………

TOPIC: METHODS OF TRANSMITTING INFORMATION RADIO

In 1894, the young Italian inventor Guglielmo Marconi began working on the idea of building a commercial wireless telegraphy system based on the use of Hertzian waves (radio waves).

By August 1895, Marconi was field testing his system but even with improvements, he was only able to transmit signals up to one-half mile.

In 1897, he established a radio station on the isle of Wight, England.

In summary, Radio is a means of transmitting information over a long distance; most especially rural areas have access to information transmitted over the radio.

It is all about sending audio messages over a long distance using electromagnetic wave.

TELEVISION

Television is used to transmit both visual and audio messages to large audience over a far distance.

Electronic television was first successfully demonstrated in San Francisco on Sept, 7^th, 1927.

The system was designed by Philo Taylor Famsworth, a 21year old inventor who had lived in a house without electricity until he was 14. While still in high School, Famsworth had begun to conceive of system that could be coded onto radio waves and then transformed back into a picture on a screen.

There was also a mechanical television system, which scanned images using a rotating disk with holes arranged in a spiral pattern, had been demonstrated by John Logie.

In summary, Famsworth scanned images with a beam of electrons while John Logie developed a mechanical television.

Television is audio – visual electronic used to transmit both the audio messages and images.

GENERATION EVALUATION

1. How can Radio and Television be used as media of information transmission?
2. Differentiate between Radio and Television.

READING ASSIGNMENT

Surfing the internet to know more on radio and Television,

Hiit @ Schools Data Processing for Senior Secondary Education, pg 23.

WEEKEND ASSIGNMENT

1. ………. is used to transmit audio messages. A.       Radio   B. Newspaper C. Television D.       Typewriter
2. ……….. is used to transmit both audio and visual messages to the audience. A.       Radio   B. Newspaper   C.       Television   D.   Typewriter
3. Radio uses ………. to transmit its content.   A.       Air   B. Electromagnetic wave  

1. Magnetism   D. Hydro

1. Radio was invented by ……… A.   Blaize Pascal   B.       Guglielmo Marconi C.   Joseph Jacquard   D. John Logie
2. One of the inventors of Television is …… A. Famsworth B.       G. Marconi   C. Blaize Pascal   D.       None of the above

THEORY

1. List any other THREE examples of modern information transmission.
2. Mention Four ancient methods of information transmission.