проект чернов.ppt
- Количество слайдов: 6
Semi – scientific conference «believe it or not» Back in the early 20 th century, people could not even imagine that such a car, a television or a computer. Scientific discoveries in the 20 th century had a significant impact on all humanity.
Scientific discoveries of the 20 th century In the 20 th century was more scientific discoveries than in all previous centuries. Human knowledge is rapidly growing, so it's safe to say that if this trend continues, then the 21 st century will be made more scientific discoveries that can radically change a person's life
In the 20 th century there was a significant breakthrough in two main areas: physics and biology. Scientific discoveries in physics/ In this area, the revolution began in the early 20 th century, when Max Planck derived the formula of the energy distribution in the spectrum of a black body which indicated that the energy emitted is not uniform, as suggested earlier, and parts - quanta. On this basis, Albert Einstein in 1905 developed the quantum theory of the photoelectric effect. Next Niels Bohr proposed a model of the structure of the atom where electrons orbit the nucleus of an atom, like planets around the sun.
Scientific discoveries in biology evolution in this area relates to the discovery of the DNA double helix. Back in 1869 opened a Swiss biologist DNA Friedrich Miescher. But then he did not imagine that is a carrier of genetic information, which unites all beings, from the human to the earthworm.
And… In the 20 th century British scientist Rosalind Franklin, performing X-ray diffraction analysis of DNA, concluded that the DNA double helix has a shape that resembles a spiral staircase. Rosalyn presented the results of its analysis of the University of Cambridge researchers Francis Crick and James Watson, who also studied the structure of DNA. And in 1953, they proposed threedimensional structure of the DNA molecule,
Questions What important discoveries were made in the 20 th century? who made them? what they did push? Do you think that these discoveries fraud?
проект чернов.ppt