mathematical term, the form of a×10 raised to the nth power. express a number in the form of (a×10 raised to the nth power), where 1≤|a|<10, and n represents an integer. this notation method is called scientific notation. in the form of power, sometimes it can be convenient to express some larger numbers encountered in daily life, such as: the speed of light is about 300,000,000 meters/second; the world's population is about: 6,100,000,000 people. we often see such large numbers in physics, and it is very inconvenient to read and write. considering that powers of 10 have the following characteristics:

generally, for 10n power, there are n zeros after 1, so that some large numbers can be represented by the power of 10, such as: 6 100 000 000 = 6.1 × 1 000 000 000.