The current projector and large screen are widely used, but the traditional keyboard and mouse-based human-computer interaction interactively bond the speaker next to the computer, and cannot realize the speaker and the audience. To solve this proble ...

The best option for astronomy is to use the maximum laser power the budget allows. Blue laser over 1000 MW is good, any green laser over 200 MW will also work. If you use 500 megawatts or more of green energy, you can get better sun exposure. In addi ...

Laser pointer is widely used in presentation. Users can be completely liberated from the computer. They are cheap, ready for equivalence, low power consumption and easier to handle PWM technology. Users don't have to put it next to the computer. The ...

The push-button matrix includes a laser push-button switch, and a laser diode and a laser push-button switch are connected to the switch. In multimedia teaching, most teachers use a laser pointer to display the content on the screen. In the event of ...

The laser pointer level can measure any object (including distant) angle or inclination, such as roof, building, column, mountain range, trees, etc. You can set any inclined angles and household appliances, the level of the equipment, and the refrige ...

A laser beam is produced by reflecting a laser beam from radiation. If the radiation is too high, it will cause photochemical damage and thermal damage to the human body, especially for children who are still in the development stage. When the skin a ...

As a society, we must understand the risk of high-performance laser from the perspective of laser safety. With the development of a new Dao laser, it becomes more complex and can produce 670, 650 and 640 & amps; Light. Because the emission wavele ...

With the integration of science and technology in modern teaching, teaching efficiency is improving rapidly. Teachers can walk off the podium and teach in front of the blackboard. Multimedia teaching method is the formation of laser beam or electroni ...

Currently, there are many types of laser pointers on the market. Laser pointers are used in many occasions. Laser pointers are easy to carry and affordable. However, most laser pointers can only achieve presentation functions and cannot change the co ...

At present, multimedia has been widely used in educational institutions, conferences, business demonstrations, etc. It can convey information to participants through text, photos, photos, sound, animation, movies and other forms of expression. Genera ...

In modern society, the use of laser pointers is becoming more and more common. It can be said that laser pointers can be used in all walks of life. Many school stationery stores also buy toy laser pointers. However, the quality of these laser pointer ...

The three conditions for laser pointer generation are: to achieve population inversion, meet threshold conditions and resonance conditions. The primary condition for stimulated emission of light is population inversion. In semiconductors, electrons i ...

The laser pointer is easy to carry, and some commercially available products have a light range of more than 50 meters, which satisfies the fresh mind of minors and is widely welcomed by primary and middle school students. Normally used laser pointer ...

Laser pointers, also known as laser pointer, pointers, etc., are pen-shaped transmitters designed to be portable, easy to hold, and processed into laser modules (light-emitting diodes) with visible lasers. Common laser pointers include red light (λ= ...

Laser pointers are widely used in daily life, such as the scene of a ball game, the scene of a singer's concert, and so on. There is the light of a laser pointer. So, what is the principle of the laser pointer? Laser pointer, also known as laser poin ...

Although laser pointers are relatively common, many people still don't know much about laser pointer. What is a laser pointer? Many stationery stores around campuses can buy a toy called laser pointer. Because laser pointers can emit beautiful beams ...

As a kind of teaching tool, laser pointer is relatively common. So, how much does the laser pointer cost? Laser pointers are more common in our daily lives, especially the light it emits is very attractive, and some children even use it as a toy. So, ...

The laser pointers that many people played with when they were young have recently appeared in the "Jianghu" again. I don't know if you paid attention to it. So, does the laser pointer have radiation? Does the laser pointer radiate? Nowadays, with th ...

Many people like to play with laser pointers very much. What are the hazards of laser pointer? Laser pointers are relatively common in life and have a wide range of uses. They do not actually have writing functions. They only have a similar shape to ...

Laser pointers have become a relatively common school supplies. What are the uses of laser pointer? We often see laser pointers in our lives. The emergence of laser pointers can be said to have reduced a lot of work burdens for many people in many in ...

Nowadays, many people are particularly curious about laser pointers. How far can the red laser pointer shine? Laser pointers are particularly fascinating for many elementary and middle school students because of their luminous effect and the far-reac ...

When many people use the laser pointer, it is easy to dazzle their eyes accidentally. Can the laser pointer recover from the eye injury? In daily life, students have many channels to access laser pointers, such as laser pointers used by teachers for ...

There are many elementary and middle school students who like to play with laser pointer. How harmful is the red laser pointer? In many middle and elementary schools, there are many small supermarkets or stationery stores outside the school. Red lase ...