Talk on Journalism by Dr. Jay Mehta

On January 15, 2019, Dr. Mass on Media and Communication Jai Mehta gave us amazing speech. Basic knowledge about the media and its development since ancient times was a very good session.

There are six major sources of Mass Media:-

                        - Radio
                        - Television
                        - Cinema
                        - Advertisement
                        - Newspaper
                        - Digital Media.
1. Radio

Radio is the technology of using radio waves to carry information, such as sound and images, by systematically modulating properties of electromagnetic energy waves transmitted through space, 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 radio waves into an electric current. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual frequencies 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 that is usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 30 Hz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.

2. Television

A television (also known as a TV) is a machine with a screen. Televisions receive broadcasting signals and turn them into pictures and sound.

Sometimes a television can look like a box. Older TVs had a large cathode ray tube in a large wooden frame and sat on the floor like furniture. Newer TVs are much lighter and flatter.

A TV can show pictures from many television networks. Computers and mobile devices also can be used for watching television programs.

Television was invented in the 1920s but the equipment was expensive and the pictures were poor. By the 1950s, these problems had been fixed and TVs became widespread.

At first, all televisions used an antenna (or aerial). This would pick up television programmes from broadcasting stations. A TV station could be many miles or kilometers away, and still be received. TVs can also show movies from VCD and DVD players or VCRs. Cable TV and Satellite television can provide more programs at once than broadcast can. Video game consoles connect to most modern TVs. Some computers can also use a TV as a computer monitor.

All TVs have screens where the picture is viewed. Before the 1950s these were usually "black and white", which made everything look grey, but all modern TVs show colors. Most 20th century screens also had rounded corners. That is because television screens were cathode ray tubes. These are like heavy glass jars with one side bulging out to form the screen.

Today flat panel displays are the usual kind. These are usually flat rectangles with straight edges. This long rectangle looks more like the shape of a movie theatre screen. This is called widescreen. If a widescreen set was 30 cm tall, it would be 53 cm wide. For this to work best, TV shows also need to be made in widescreen. Widescreen sets can still be any size, but they have the same widescreen shape.

3. Cinema

Cinema plays an important role. It is known as the charming world. Which are very attractive, we rarely get the facts. Cinematography is very helpful for getting information. Nowadays, cinema is one of the most popular sources of media and communication. Cinema has shown us entertainment as well as social problems and current issues.

4. Advertisement

Ads are also an important part of mass media and communication. Creativity is a field.

5. Newspaper

A newspaper is a periodical publication containing written information about current events.

Newspapers can cover a wide variety of fields such as politics, business, sports and art, and often include materials such as opinion columns, weather forecasts, reviews of local services, obituaries, birth notices, crosswords, editorial cartoons, comic strips, and advice columns.

Most newspapers are businesses, and they pay their expenses with a mixture of subscription revenue, newsstand sales, and advertising revenue. The journalism organizations that publish newspapers are themselves often metonymically called newspapers.

Newspapers have traditionally been published in print (usually on cheap, low-grade paper called newsprint). However, today most newspapers are also published on websites as online newspapers, and some have even abandoned their print versions entirely.

Newspapers developed in the 17th century, as information sheets for businessmen. By the early 19th century, many cities in Europe, as well as North and South America, published newspapers.

6. Digital media

Digital Media is famous in Youth. But as a source of all, we also get duplicate information in this source. And this is the negative side of the media source.

Thank you...