The Dhaka Times Desk Nowadays, the world is like a standstill without a mobile phone. But the history of this mobile phone is unknown to many of us. How did the mobile phone come and who spoke first on this mobile phone?
Have you ever wondered how this mobile phone was invented? Today we will know the history of the invention of this mobile phone.
The first mobile phone was made in 1973. And it is made in New York city of America. It was built by engineer Martin Cooper. That is why he is called the father of mobile phone.
Martin Cooper, the father of the mobile phone, worked at Motorola, a small telecom company at the time. But he had a dream - a day will come when everyone will have his own phone, on which he can be contacted at any time.
At that time, the telephone was a thing that was connected to people's desks and homes by wires. That's why the concept of mobile phone was like science fiction to common people. The idea of mobile phones came to Martin Cooper's mind for the first time when he saw the characters of an American comic called Dick Tracy communicating with each other with the help of a video wristwatch. That's exactly what a team of 20-30 people led by Martin Cooper built in just 30 days.
Not today, 48 years ago in April 1973, the first mobile phone model was introduced at the Hilton Hotel in New York. The first mobile phone was 10 inches long and 2 inches wide and about 4 inches thick. The weight of that mobile phone was more than one kg. Back then, the phone's battery would run out after only talking for 20 minutes. So many people laughed at that phone. But actually making such a phone at that time was an impossible challenge.
Martin Cooper himself also made the first call with a mobile phone in the history of the world. He made the first call to an engineer friend of his at AT&T while walking down New York's 6th Avenue.
Mobile phones were invented based on a technology called cellular technology invented by AT&T. AT&T has never thought of carrying a phone by hand. They invented this technology primarily to connect telephones to cars. However, the small company Motorola exceeded the imagination of AT&T, the world's largest telecom company at that time. First of all, the first mobile phone in the market Motorola company! But it took another 10 years for the first mobile phone to hit the market. In 1983, the Motorola DynaTAC (DynaTAC) model mobile phone came to the market for the first time.
The price of that mobile was 4 thousand dollars, the current market value of which is more than 3 lakh rupees! Apart from that the call rate was much higher then. In that era, mobiles were mostly used as toys for adults. To many, this mobile looked like a brick, and to some, it looked like a shoe. So many called it The Brick. Again someone said good phone. However, Martin Cooper named it Dynamic Adaptive Total Area Coverage; In short what was called Dynatack. That mobile phone will become so important in people's lives, maybe no one realized then!
Today, mobile phones have everything including radio, TV, music player, camera, internet! Today more than 87 percent of the total population of the world has come under mobile phone communication and more than 511 crore people are using this mobile phone regularly!
Only 10 companies have occupied 76 percent of the world's smartphone market, which once started with Motorola. As we can easily communicate from one end of the world to the other through mobile phones; Using the deep space network developed by the US space research organization NASA, it is possible to maintain communication from the Earth to the outer solar system.
And with this technology, NASA conducted the Voyager mission in 1977. Voyager 1 is the farthest man-made object from Earth so far. Voyager is still active 44 years after launch.
In today's 21st century, mobile phones have radically changed our way of life. Now we don't have a moment without a mobile phone! Some more amazing technologies are added to smartphones in the future; Now the world is just waiting to see. Source: Ekushey Television via Internet.
Things to do to prevent Corona virus
# try to stay at home all the time.
# Follow the rules and use mask when going out for emergency.
# three-layer cloth mask can be washed if desired.
# wash clothes after coming home from outside. Or hang it without shaking for at least four hours.
# Wash hands thoroughly (for at least 20 seconds) with soap or liquid before coming outside.
# plastic PPE or eyes, face, head must be washed thoroughly with detergent and dried after one use.
# Wear PPE made of cloth or clean as described.
# Use a head cap that completely covers the hair.
# Those who have sneeze cough should follow all the rules promulgated by the government. Also, wash hands as directed before and after handling food items, keys, switches, mice, remote controls, mobiles, watches, computer desks, TVs, etc. and after using the bathroom. Those who have dry hands use Moisture after washing their hands. Soap or hand liquid can be used. Why can this virus remain in the crackle (cracked part) of dry hands? Avoid using highly alkaline soaps or detergents.
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