People will ask a series of questions: Is radiant energy related to temperature? Is the radiation evenly distributed throughout the spectrum? Is there any difference in energy in some parts of the spectrum?
After accurate measurement, scientists found that the radiation energy reached the highest value in a narrow band of the spectrum. People use curves to describe the relationship between radiation and wavelength. After getting the accurate graphics, it is to find the appropriate teaching description for the graphics. The above two mathematical formulas only want to express the trend of the curve, but they can never find all the expressions of energy distribution.
So Planck began to study this problem.
1900, Max Planck got a formula suitable for long wave and short wave by piecing together. But he still hasn't figured out the theoretical principle of doing so. He said: "it has only one meaning at the beginning, that is, it may be a guessed law." My later job was to find out the real physical meaning. "
Planck assumes that the radiation of an object does not change continuously, but jumps at integer times. This premise is met and all problems can be solved.
He first introduced an invariant, Planck constant. Energy is transmitted in the form of energy packets, and Planck constant is the product of energy and time. The radiation of the heater can only be carried out at an integer multiple of this constant.
The transmission of energy is one after another, not smooth and continuous. Planck named this one guanta, which comes from Latin guantum, meaning "quantity"