The selection principle of the dome light umbrella
There were many factors to consider when choosing a dome light umbrella. In terms of fabric structure and usage, there were white, silver, gold, blue, transparent umbrellas, umbrella boxes, giant parabola umbrellas, and many other types. The white reflective umbrella was softer. Although it was a little harder than a soft box of the same size, it could create a soft light with moderate light ratio, rich shadow tone, and wide light field. It could be used as a more common choice. The light from the silver umbrella was very hard and difficult to control, so it was generally not recommended. Different colors and types of umbrellas had different light effects. It was necessary to choose the appropriate dome light umbrella according to the actual shooting needs, such as the softness of the required light and the difficulty of controlling the light type. Read more exciting novels for free
Is the selection principle of paper books and e-books the same?
The principle of choosing a printed book was different from an e-book. In terms of reading purposes, electronic reading was more advantageous for searching for information, reading academic papers, best-selling literature fast food, comic books, biographies, essays, and management cases. Paper books were more suitable for aptitude, examination, classic literature (especially ancient books), poetry, and songs. Based on the characteristics and depth of the content, books with strong systematic content, complex internal logic, repeated reference, systematic operation guidance, content that needs to be traced back, teaching materials, interaction, science, engineering, agriculture, medicine, mathematics, IT, ancient books, unfamiliar foreign languages, and operation guidance are suitable for paper reading. If the reader was familiar with the book's concept category, had a high grasp of the content field, was suitable for the "book splitting" reading method, and did not emphasize too much on systematic content (such as plot, chicken soup inspirational, case studies, guided reading, stress relief, popular science, and suggestions), it was more suitable for electronic reading. From the perspective of the pre-set reading scenario, reading in fragmented time or reading with a strong sense of immersion was suitable for electronic reading materials. For desk studies such as law, mathematics, science, engineering, agriculture, medicine and other professional reading materials that needed to be read in a whole time system, it was better to use the paper version for the first reading. For foreign languages and ancient books that needed to be consulted at any time, it was also recommended to use the paper version for reading. In addition, in terms of price, portable, storage space, and searchability, e-books had the advantages of being portable, having a large storage capacity, being cheap, and being able to search for content. Paper books were better in terms of reading experience, health (eye friendly), collectible value, and no need for electricity. These factors would also affect the principle of choice between the two. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the meaning of the theme selection principle of street photography?
The theme selection principle of street photography mainly included the following aspects: 1. Street photography can capture the details and moments of daily life, such as people's expressions, movements, scenes, etc. The most natural and most life-like images are often valuable. 2. ** Reflect the characteristics of the era **: Reflect the characteristics of the current era by shooting people and scenery on the streets, such as pop culture and social style of a specific period. 3. ** Follow your personal interests **: The photographer can focus on a certain subject according to his own interests and hobbies. This will help to deepen the shooting and improve the photography skills. 4. ** Demonstrate the spirit of humanism **: The work should contain human feelings such as equality, compassion, and sympathy. It should record things that can move you, so that the photo can move others. 5. ** Pursue uniqueness **: Try to choose a theme, scene, or shooting method that no one else has taken before. Explain your own point of view and standpoint through the photos to avoid the work being drowned in many images. 6. ** Storytelling **: The theme should be able to convey a certain story or emotion, such as capturing a moment with a story or special expression, so that the audience can interpret more content from the photo. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Principle of Healing Light
All you gave me was the " Principle of Healing Light ". This isn't related to a novel. There isn't enough information for me to integrate and polish it according to the requirements. You can tell me more details, such as which novel mentioned this concept, and is there any specific explanation about it?
The Light Reaction Principle of Purple Light
The reaction principle of the purple light was as follows: The fluorescent reaction of a purple light lamp was based on the principle of luminescence. When a violet light (a violet flashlight) shone on certain substances, these substances would selectively absorb the violet light emitted by the violet light. The molecules would be stimulated, and they would emit visible light of the same wavelength and different intensity. When the light stopped, the fluorescence disappeared. When the infrared rays hit the fluorescent substance, there were three general situations: part of the infrared rays were reflected; part of the infrared rays were absorbed by the fluorescent substance; and part of the infrared rays were transmitted. The fluorescence occurred due to the absorption of the fluorescent substance. After the fluorescent substance absorbed the infrared rays, the internal energy state of the molecules changed, showing a transition between different energy levels and releasing fluorescence. For the Lighthouse series of purple lamps, the principle of light was to bombard the special fluorescent material inside the lamp with electric arcs after being energized, and then produce purple spectrum light waves. The violet light could be divided into the UUA band (320 - 400 <anno data-annotation-id ="00000100 - 400a-400a-400a-800a-8000000000000"> wave-length </anno>), the UVP band (275 - 320 </anno>), the UVP band (200 - 275 </anno>), and the UVR band (100 - 200 </anno>). Among them, the fluorescent powder in the purple tube could convert the arc energy into long-wave violet radiation in the UVA-band, such as the UVA-band of 340 - 380 run, and the UVA-band of 365 run was more suitable for checking the fine traces of the collection and fluorescent anti-counterfeit work. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Light Sail Spaceship Principle
The principle of the light sail spacecraft was to use the light pressure produced by the photon to obtain thrust. In the universe, the photons emitted by the stars were like the wind generated by the atmospheric circulation on Earth. They could become the power source for the spacecraft to move forward. When the light sail expanded to a large enough area, the thrust generated by the photon impact on the light sail would cause the spacecraft to move. For example, the light sail of the light sail spacecraft was made of special materials, such as aluminum plated Myra. Its thickness could be as thin as a few hundred atoms in diameter. When the spaceship was illuminated by light, it could use the light sail to carry the light pressure to obtain energy and continue to accelerate. For example, the spacecraft in the " Breakthrough Starshot " program of the United States only weighed about 10 grams. It was integrated with a variety of small but efficient instruments. The external light sail could theoretically accelerate the spacecraft to tens of thousands of kilometers per second in a few minutes under the illumination of light, and finally stabilize at 20% of the speed of light. The novel " Hundred Years of Spaceship " is equally exciting. Everyone is welcome to click and read it!
Soft light umbrella vs reflective umbrella
Soft light umbrellas were white or silver mirrors. When the surface reflected light, it would spread the light, making the light softer and producing a more natural lighting effect. Reflective umbrellas were silver or gold mirrors. Their surfaces reflected light highly, making the light stronger and brighter, thus producing a more vivid lighting effect. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Umbrella, the Light of Humanity
The characters in the movie included the male lead, Sui Bian, the female lead, Umbrella, the real female lead, and the male supporting character, Leon. His masterpiece was "To Understand a City, Start by Taking a Car." "Umbrella, the Light of Mankind" by Little Seven Heavens. It was a novel about the infinite heavens. It had a system style, decisive killing, Cthulhu, mecha, no female protagonist, technology, and boss elements. User recommendation: "The oldest and strongest emotion of humans is fear. And the most ancient and strongest fear is the fear of the unknown." - Howard Philip Lovecraft Umbrella. As a typical villain company, it had become a giant enterprise that secretly protected mankind. While humans believed that society was becoming more prosperous, Umbrella's private troops were fighting against all kinds of abnormal phenomena (zombies, vampires, alien races, and even ancient evil gods). I hope you will like this book.
What is the principle of reflecting light and shadow?
The principle of light reflection could be explained by Huygens 'principle. Huygens' principle pointed out that every point on the spherical wave surface was a sub-wave source of a secondary spherical wave. The speed and frequency of the sub-wave were equal to the speed and frequency of the primary wave. The envelope of the sub-wave surface at each moment was the total wave surface at that moment. When light travels to different substances, it changes its direction of transmission at the interface and returns to the original substance. This is the reflection phenomenon of light. The reflected light and the incident light are on the same plane as the normal line. The reflected light and the incident light are separated on both sides of the normal line. The reflection angle is equal to the incident angle. In pictures, for example, the " ghostly shadow " phenomenon was the reflection of light through the lens of the camera, which was then captured by the LCD sensor. In the original art light and shadow production, reflection was a phenomenon caused by the reflection and refraction of light on the surface of the object. It could make the object in the picture interact with the environment to create a real light and shadow effect. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the principle of reflecting light and shadow?
When light travels to the interface between two media, if the degree of unsmoothness of the interface at the point of incidence is much smaller than the wave length, it can be regarded as a smooth interface. At this time, a part of the light will return to the original medium. This phenomenon is the reflection of light, which is also the principle of the reflection of light and shadow. The reflection of light on a smooth interface is called mirror reflection (or single-directional reflection). The reflected light, the incident light, and the normal are in the same plane. The reflected light and the incident light are on both sides of the normal, and the reflection angle is equal to the incident angle. If the interface is not smooth enough to be larger than the wave length, it will produce diffuse reflection. If there is both mirror reflection and diffuse reflection, it is called mixed reflection. If the brightness of light in different directions is the same in diffuse reflection, it is called uniform diffuse reflection. In the same reflection process, some of the light of some frequencies are reflected more, which is called selective reflection. It can use coating technology to change the optical properties of the interface of the medium, so that the reflected light can reduce or increase the light component of a certain frequency to adapt to the requirements of different optical components. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>