1, the infinite scenery is occupied regardless of the flat land or the mountain tip. 1 1 The Bee Don Luo Yin
2, the lake is full of moonlight, and there is no wind mirror on the pool surface. 1 1 Wangdongting Yuxi, Liu Tang
3, the east wind is full of worship, and the fragrant fog turns to the corridor. 1 1 Haitang stone
4, winning the day to find the waterfront, boundless scenery. 1 1 "Spring Day" Song Zhuxi
5, flying in the plum flute at night, the cold sand is clear and the moon is bright. 1 1 "Smell the flute on the fortress"
6, revisit the sun and the moon, how to repay the grace of parents. 1 1 Xie Biemao Xianweng
7, Pu Tao wine luminous cup, want to drink pipa immediately. 1 1 "Two Poems of Liangzhou" Don William Wang
8. The scenery is getting old, and it is early spring in Liu Mo, Huaxi. 1 1 Book Love in Early Spring
9. Dongcheng gradually feels that the scenery is good, and it is wrinkled and welcoming people. 1 1 "Jade House in Spring" Qi
10, lanling wine tulip, jade bowl filled with amber light. 1 1 "Traveler Bank"
1 1, Hongyan flew too long and the ichthyosaur dived into the water. 1 1 Moonlit Night on the Spring River
Introduction to light:
Is a physical term, the essence of which is photon flow in a specific frequency band. The light source emits light because the electrons in the light source gain extra energy. If the energy is not enough to make it jump into outer orbit, the electrons will accelerate and release energy in the form of waves.
If the transition just fills the vacancy in the orbit and reaches the stable state from the excited state, the electron will stop the transition. Otherwise, the electrons will jump back to the previous orbit again and release energy in the form of waves.
Characteristics of light:
1. In geometrical optics, light travels in a straight line. The direct beam and the sun's rays illustrate this point.
2. In wave optics, light propagates in the form of waves. Light is like water waves on the water. Different wavelengths of light show different colors.
3. The speed of light is extremely fast. 299792458≈3× 10 in vacuum? M/s, the speed in the air is slow. In the medium with large refractive index, such as water or glass, the propagation speed is slow.
4. In quantum optics, the energy of light is quantized, which constitutes the quantum (elementary particle) of light. We call it photon for short, so it can cause chemical changes of film emulsion and other substances.