He described gravity and three laws of motion in the paper "Laws of Nature" published by 1687. These descriptions laid the scientific view of the physical world in the next three centuries and became the basis of modern engineering. By demonstrating the consistency between Kepler's law of planetary motion and his theory of gravity, he showed that the movements of ground objects and celestial bodies all follow the same natural law; It provides strong theoretical support for the sun-centered theory and promotes the scientific revolution.
In mechanics, Newton expounded the principle of momentum and momentum conservation. In optics, he invented reflecting telescope, and based on the observation that a prism diverges white light into the visible spectrum, he developed the color theory. He also systematically expressed the law of cooling and studied the speed of sound.
In mathematics, Newton and Leibniz shared the honor of establishing calculus theory. He also proved the generalized binomial theorem and put forward Newton's method to approximate the zero point of function, which contributed to the study of power series.
Now introduce some commemorative stamps about Newton.
Figure 1 Yes 1957 French "World Celebrity" stamp.
Figure 2 is one of the "Famous Scientists" stamps issued by Poland in 1959.
Figure 3-5 shows 1987 "The 300th Anniversary of isaac newton's Mathematical Principles of Natural Philosophy" stamp issued by Britain. Figure 3 shows "Enlightenment of Apple Landing". It is said that Newton was lying under an apple tree and was hit by an apple. He thought, why did the apple fall? Then study deeply to discover gravity; Fig. 4 is "an object moving in an elliptical orbit"; Fig. 5 is "Optics: A Paper on Refraction, Reflection and Color of Light".
Figure 6 shows the stamps issued by Soviet Union 1987 to commemorate the 300th anniversary of the publication of Newton's Mathematical Principles of Natural Philosophy.
Figure 7 is a stamp issued by Germany 1993 to commemorate the 350th anniversary of Newton's birth. Above the stamp is the mechanical formula, and below is the principle of light dispersion under the prism.
Fig. 8 is one of the 350th anniversary pictures of the Royal Society published in Britain in 20 10. Newton's "brain storm" is a famous case of Newton's dispersion experiment with lens.