The poems about light are as follows:
1. The light of the mountain is pleasing to the birds, and the shadow of the pond is empty of the human heart.
2. As soon as the half-acre square pond is opened, the skylight and cloud shadows linger.
3. The light reflects the moon in the building, and the flowers sing and sing to fan the wind.
4. The lake is bright and broad, and the geese are flying far away.
5. When Guangwu revitalized the country, all Han ministers were honored.
6. Guangwu's business was not yet prosperous, and Wang Lang's military revolution was at Pingling Mausoleum.
7. The bright moonlight in front of the bed is suspected to be frost on the ground.
8. The luminous cup of grape wine reminds you immediately if you want to drink Pipa.
Light is a physical term, and its essence is a flow of photons in a specific frequency band. A light source emits light because the electrons in the light source gain extra energy. If there is not enough energy to jump to an outer orbit, the electron accelerates and releases energy in the form of a wave.
If the vacancy in the orbit is just filled after the transition, and the electron reaches the stable state from the excited state, the electron stops transitioning. Otherwise the electron will jump back to its previous orbit again and release energy in the form of a wave.
The history of light research is the same as that of mechanics. It has attracted attention in the ancient Greek era. The law of light reflection has been famous as early as the time of Euclid. However, before the separation of natural science and religion, human beings had no understanding of light. There has been almost no progress in understanding the essence of light, and it only remains at the level of formal understanding of the spread and application of light. In the seventeenth century, two voices began to exist on this issue: the wave theory and the particle theory.