Who took the first photo? Detailed answer

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Who took the first photo? Detailed answer

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Who took the first photo?

The desire of a person to capture what he sees around him is not one century old. From the eleventh to the sixteenth century, there was a device called the camera obscura. It was the forerunner of the photographic camera. With the help of a camera obscura, the image was projected onto paper, and this image could be traced with a pencil to get an exact reproduction of it on paper.

In 1802, two inventors, Wedgwood and Humphrey, took an important step forward. Using contact printing, they managed to transfer the silhouettes of drawings made on glass onto paper coated with nitrogen silver. But they didn't find a way to save these prints.

In 1816, Joseph Niepce made a camera with which he managed to get a negative image. And in 1835, William Talbot managed to get a permanent image. Talbot was the first to produce a positive image from negatives, the first to develop photo printing, the first to publish a book illustrated with photographs in 1844. Since that time, inventions and improvements in this area have gone one after another.

The widely known Kodak camera came on the market in 1888. This is where modern photography began. Most photographic processes are based on the fact that silver nitrite blackens when exposed to light. And this phenomenon was discovered in the XNUMXth century by alchemists who were looking for ways to turn ordinary metals into gold.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What makes the earth revolve around the sun?

Let's start by determining what makes the Earth and other planets move. According to one of the theories about the origin of the solar system, about 5 billion years ago, a huge cloud of dust formed and began to rotate. It turned into a disk, and the hot central mass became the Sun. The outer parts of the dust cloud turned into separate swirling masses, from which the planets then formed.

And now the planets, one of which is the Earth, continue to rotate. And why the Earth and other planets do not fly away into open space? This is prevented by the gravity, or attraction, of the Sun. According to Newton's laws of motion, a moving object tries to continue its movement in a straight line until it is acted upon by extraneous forces. Therefore, moving planets tend to fly away from the Sun in a straight line. But external forces prevent this, keep the planets in their orbits. These external forces are solar gravity, that is, solar attraction.

Each planet moves in its own orbit and the speed of its movement depends on its distance from the Sun. The planet moves faster when it is closer to the Sun and slower when it moves away from it. The Earth moves at a speed of 30,2 km/s when it is closest to the Sun, and at a speed of 29,2 km/s when it is at its furthest from it. As the planet orbits closer to the Sun, the Sun's gravitational pull is stronger; when it moves away, the gravitational pull weakens. Greater gravity causes a greater speed of the planet. For example, Mercury moves at an average speed of 47,9 km/s, and Pluto at an average speed of 4,6 km/s.

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Random news from the Archive

LCD TVs are ready to push the plasma 20.12.2004

Sharp Corporation announced the creation of an LCD TV with the world's largest screen. Its diagonal is 65 inches (1,64 m).

Apparently, the plasma panel market will have to face a new competitor. Sharp promises to sell a new model called Aquos at a price comparable to the cost of plasma panels. Sharp launched the world's first 14-inch LCD TV in 1988.

In 2000, the company launched a 28-inch LCD TV, a 30-inch device appeared in November 2001, and a 37-inch device in November 2002. The market for TVs with a diagonal of more than 40 inches was recently completely owned by manufacturers of plasma panels.

Sharp and Samsung Electronics were the first manufacturers to release LCD models larger than 40 inches. In August, Sharp announced a 45-inch LCD TV, and now a new 65-inch model is ready. Its screen size is 1428x804 mm, and the diagonal size is 1639 mm. The resolution of the new TV is 6,22 million dots (1920x1080).

In the race for the largest LCD screen, Sharp managed to break away from its longtime rival Samsung, which holds the current record - a model with a 57-inch screen. Simultaneously with the Aquos TV, the company intends to release another model in the near future - with a diagonal of 50 inches. The full production cycle of Aquos TVs - from the production of LCD panels to final assembly and adjustment - will be carried out at the plant in Japan.

Company director Takashi Okuda believes that the advent of large TVs will significantly change the perception of the possibility of using LCD displays. He did not give an exact price for the new TVs. Recall that the previous Sharp model with a diagonal of 45 inches was recommended for a little less than 1 million yen ($9017). Sales of Sharp LCD TVs have grown by 90% over the past six months.

The company estimates that the global market for color TV sales is estimated at 130 million a year, while LCD TVs account for only 7,5 million. Sharp believes that the share of LCD TVs will grow steadily.

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