How a Television Works
The job of a TV set is to turn the electronic signals created by TV
cameras and microphones back into pictures and sound. The TV's aerial
picks up the signals from the transmitting studios and they then
travel down a cable to the aerial socket at the back of the TV. When
you switch on the set, the sound and picture signals are separated
from each other and from the carrier waves. (The TV signal on its own
isn't powerful enough to travel very far so it is mixed with the much
more powerful carrier wave and can then travel much larger distances.)
The sound is then sent to the TV's loudspeaker. The picture signal is
split into three separate colour signals; red, blue and green. If you
look closely at a television screen you can see that the picture is
made up of lots of horizontal lines. These lines are made up of tiny
dots which glow red, blue or green. Your eye has three types of
detectors - called cones - that react to these colours differently.
There's a red cone that likes red light, a green cone that likes green
light and a blue cone that likes blue light. When any colour enters
your eye and hits these cones they send messages to your brain saying
"I'm seeing red light" or "I'm seeing green light" or eve "I'm seeing
a bit of blue and a bit of green". When the light from the dots on the
television screen enters your eye, each cone sees each colour and
sends a signal to your brain. Your brain then works out what colour it
is supposed to be seeing from these signals. The screen itself is part
of something called the picture tube. At the back of the picture tube
are three electron guns (that fire electrons rather than bullets!) one
for each colour. The electrons are shot out of the gun and hit the
screen. These dots are made of phosphor, which glows when electrons
hit it, the stronger the beam of electrons the brighter the glow.
...on and bring pleasure in the form of entertainment. Even though television, a technology that produce moving picture and current events affected the lives of America from 1930s to 1960s. They found a way to recuperate by minimizing the use of television and maximizing the use of the outside world.
The ‘Golden Age of Television’ is what many refer to as the period between the 1950s and 60s when the television began to establish itself as a prevalent medium in the United States. In 1947, the American Broadcasting Company (ABC), Columbia Broadcasting System (CBS), the National Broadcasting Company (NBC), and the Du Mont Network were the four main television networks that ran stations with regular programming taking place. (Television, 2003) While regular television programming was a new innovation, the television itself had been commercially available for over twenty years prior to the 50s. It was conceived by many worldly innovators and went through several testing stages before it was finally completed in the late twenties. The three main innovators were Niplow - who first developed a rotating disk with small holes arranged in a spiral pattern in 1884, Zworykin - who developed the Iconoscope which could scan pictures and break them into electronic signals (a primitive form of the Cathode Ray Tube) in 1923, and lastly Fansworth - who demonstrated for the first time that it was possible to transmit an electrical image in 1927. (Rollo, 2011) However, one of the many reasons why this medium was successful in the 50s was due to the fact that it became more accessible to the public. Television sets were more affordable to middle class citizens which created further interest in the new technology. Through an historical account of the medium, the spread of television across America throughout this particular decade will be examined.
TV show the essence of a what a TV is in the manner of what it means to be a TV in this day in age. The TV in it self is not just the glass, plastic and metal in their separate forms but once brought together with the Idea of a traditional TV set. Where the glass is used to show an imagine on the screen and the plastic as a way to keep the metal components unexposed. The Efficient cause, this refers to the reason behind something’s existence. In the example, a TV exists because someone had the idea to build one and put all the parts together to make it
Before television existed people had to depend on Radio stations to receive their little bit of entertainment and news. But in 1878, the invention of TV began. The first TV made didn’t look anything like the way TV’s look today. It was a mechanical camera with a large spinning disc attached to it (Kids Work). But as over the years, of course, inventions of different TV’s progressed and by the 20th century about 90 percent of our population had a TV in their household (MGHR). Television today is mainly used for people take a break from their life by relaxing and enjoying some entertainment.
The Television Decoder Circuitry Act of 19903 required all new televisions sold in the United States to contain a chip to decode closed-captioning4 signals. The basic technology needed to implement the V-chip is the same as that currently used for closed-captioning.
Readability of text: The grade level I chose is fifth, and the material comes from McGraw-Hill’s Reading Wonders. “The Boy Who Invented TV” by Kathleen Krull and illustrated by Greg Couch is the text I used to apply Fry’s Readability Formula. The Lexile Text Complexity Range is set at 860 and the Text Evaluator is at 38 for this particular story. “The Boy Who Invented TV” was an appropriate biography for fifth grade, however I was surprised to use the Fry’s Readability Formula and find that it was actually graphed at an upper seventh grade level. After doing this readability I have a newfound understanding as to why students, especially lower level, can really struggle with the text found in their books. It is much more evident that after reading
One of the ways that the TV can have an effect on our surroundings is by the amount of power that is needed to run all of the TV’s in the world. I realize, that compared to other appliances, a television does not use a huge amount of energy. But think about this: almost every family in America has at least one TV if not more (some people that I know have upwards of 6 and 7). Can you imagine the power it must take to run all of these televisions? And this is only in our country! Just think, if our society would stop watching television, we could save huge amounts of energy (fossil fuels) each year. This extra energy (fuel) could be used or saved in more efficient ways.
proper place on the motherboard. You will then have to connect all the cords from
As similar their names might sound, a television is not like a telephone. A telephone connects two people's minds to each other, while a television only sends pictures and sounds to one person's eyes and ears. In fact, if you let television affect your mind too much, it can cripple your imagination. You might have more images stored in your mind, but you will be out of practice for generating new ideas. Television does not provoke original thought.
Adams, Guy. “Is your TV spying on YOU? It sounds like science fiction but many new TVs can watch you- telling advertisers your favorite shows or even filming you on the sofa. And there’s no off switch!” Mail Online. (25 Nov 2013). Web.30 Mar .2014.
Factors that Shaped the Invention and Development of Television in the UK Up to 1939
Overall there are many advantages to digital television. The point to creating digital television is to receive digitally encoded broadcasts. These digital broadcasts are more picture perfect and have more lifelike sound than analog television. In an analog system the waves are modulated into mechanical form and transmitted through air or over cable. In a digital system sound and images are analyzed first then converted into a stream of numbers. Digitized information is transmitted in this system, not mechanical waves(Johnson).
Television is the center of the household. It will always be there. You cannot ignore it just as you cannot ignore a
A computer is a device which is used for several applications; business, gaming, or school. It’s important for people to know how computers work because in this day and age, operating a computer is an everyday task. This complex electrical device utilizes several parts inside of it to keep itself cool, conduct the proper tasks, and maintain stability. These devices can be found several places whether it be on the job, in one’s room, or on a school campus. Computers are essential for everyday use in order to complete what is required. What each component is and its function will be described.