What Is The Laser Pointer Pen And What Is The Advantage of It in Teaching
Posted Jan 31 2013 9:17am
I believe everybody knows pencils, ink pens, ball pens. But I don’t think everyone knows Laser Pointer . It is a connection of laser and pen, and is used in many occasions today. When doing demonstration teaching, teachers need to keep beside the computer and explain the emphasis, it is very inconvenient, and even limited the body language of the teacher. As a result, advanced teaching equipment has not been fully utilized, but the affect the traditional teaching of the class. A Laser pointer is a small laser designed to highlight something of interest by projecting a small bright spot of colored light onto it. The Laser pointer is not in itself visible from the side, but is visible as a result of light scattered by dust particles along the beam path. The small width of the beam and low power of typical laser pointers make the beam itself invisible in a reasonably clean atmosphere, showing a point of light when striking an opaque surface. Some higher powered laser pointers are faintly visible via Rayleigh scattering when viewed in moderately or dimly lit conditions. 200mW 532nm Green Beam Laser Pointer Pen 3. 7V igniting matches(1X18650) 1. This is a commonly u We have all seen our share of Green Laser Pointer, either being used as presentation pointers or as simple astronomy laser pointers, but unfortunately they are giving lasers a bad name. This is simply because of how poorly crafted most of these laserpens actually are. People looking for precision light instruments are persistently being stuck with shoddy laser diodes that burn out or malfunction long before the beam should die. It seems finding high quality laser pens will require a bit more research to do nowadays. If you know where to look, the internet can open the door to a plethora of reputable laserpen retailers. Many of these companies carry different laser beam color frequencies (the most popular of which are green laser pens) as well as output powers, so finding a high quality laser pointer pen to meet your particular needs can be easy. However, there are some things you must always look for to determine the quality and value of a laser before you decide to order the device. The most common colors for laser pointer pens are red, green, and blue. Red laser pointer usually produces the weakest light, operating at 650nm, green at 532nm, and blue being the strongest operating at a wavelength of473nm. Certainly, the light is stronger, the price is more expensive. Cheap Laser Pointers can either require AAA batteries or some less common type of battery. Decide if it will be worth it to have to go out and find less common batteries when they need to be replaced, or if the benefits of style and comfort outweigh the inconvenience. Eliminate this problem entirely by always keeping spare batteries nearby. If you want to save money, maybe a rechargeable batteries are good for you. If you want to buy cheap laser pointers, you can go to our site to have a look. if you want to know more detail information about china electronics products and china electronics wholesale, please visit our website:http://www.lasersbeam.com/.