The document summarizes the history and development of television. It discusses some of the early discoveries and inventors that contributed to the foundations of television, including the discovery of electromagnetic waves, selenium's reaction to light, and Paul Nipkow's rotating disk. It then outlines the development of different types of televisions based on their physical form (e.g. convex, flat screen), input signal (analog, digital), and broadcasting method (regular, subscription). The document also lists some advantages of television like its wide range and ability to combine images/sound, and disadvantages such as its fast pace and high production costs.

2. The beginning of the discovery of television would not be
separated from the basic discovery , that is the law of
Electromagnetic Waves discovered by Joseph Henry and Michael
Faraday ( 1831 ), which is the beginning of the era of electronic
communication . In 1873 a telegraph operator discovered that
light affects the electrical resistance of selenium . He realized it
could be used to convert light into electrical current using a
photocell silenium (selenium photocell) .
Then a student named Paul Nipkow in Berlin , Germany in 1884
discovered a small metal disk rotating with holes in it and is
referred to as the forerunner to the birth of television .

3. Around 1920,John Logie Baird and Charles Francis
Jenkins using the work of Paul Nipkow disc to create a
system in the image capture , transmission , and reception .
In 1923 Vladimir Zworykin Kozma , registering a patent in
his name for his invention , kinescope , the world's first
television tubes . Zworykin openness to criticism , making
new discoveries again is a camera tube that is named
iconoscope . He was later referred to as the inventor of
television . ( 1889-1982 ) .

4. Development television and its
various
1 . Based on its physical form
Among others :
a. Convex screen television , which is telivisi
screen made from a CRT to display the
picture tube .
b . Flat screen television , a distinguished television
screen made ill from the tube,through the flat
shape or plate .

5. 2 . Based on the input signal
among others :
a. Analog television , which encodes
television picture information by varying
the voltage and or frequency of the signal .
b . Digital television , television that uses digital
modulation and compression to distribute
video , audio , and data signals to the
television .Is a form of digital
television from analog television complex
that is in the interest of consumers .

6. 3 . Based on the method of broadcasting
among others :
a. Television regular , daily television
broadcasts which are free .
Attendance ill be charged to view the
entire show imaginable .
b . Subscription television , television
broadcasting which can be enjoyed
with a subscription , for example :
indovision channel that broadcasts
presenting the news from within the
country and overseas .

7. Advantages of Television
- A very wide range
- Impressions instantaneous
- Combined images, sound and color
- Demonstration effect
- The timing of exposure is easy
- Easily Control

8. Disadvantages of Television
-Fast pass, high frequency
- Relatively expensive
- There is no segmentation viewers
- Description and messages should be short
- Production of a long and expensive materials