Laser Guide

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New Features of Blue Laser Pointers and Their Use

The wonder of the modern millennium is the invention of blue laser pointer. One can ask a number of questions. They can argue that there are a number of high qualitative and sophisticated pointers in the market. There are red laser pointers. There are green and yellow laser pointers in the market. In reply to their question tags it can be said in a very simple way that blue laser is much more advanced and latest.

The birth of red and green laser pointers took place several years ago and blue laser pointers came into the market only a few years ago. So it can be imagined that within short span of time how a pointer could earn fame and recognition in the international market. There are some factors behind its popularity. The first thing is its capability to release transparent blue beam. It is not easy to produce bluish beam. It is rare therefore it is sumptuous. A blue laser pointer can cost $1000 in comparison to other laser guided pointers. The sleek design is an extra feature of this pointer. It is much evident that blue laser pointers are upgraded with lithium battery.

So one can use blue laser pointer even in total darkness. It can be used in different ways. To keep the well track of the movement of the birds in the high altitude, one can use blue laser pointers. Professionals are very much interested to use laser guided pointers to highlight the different LCD projections. It can even move freely in the room. So with the advent of the blue laser pointer, people get benefited in different ways. However, the less powered blue laser pointers are to some extent detrimental to the eyesight so it is up to the users to take some pre-emptive measures to avoid such accident. Though the price of blue laser is little bit higher but with time preceding it will fall down.

About the Author

David has been writing for over ten years on a broad range of topics. He has a background that includes such diverse areas as environmentalism, cooking, animal care, and technology. Now he works as an editor for a famous wholesale company.

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How many photons per second does a laser emit?

A laser emits a light beam with a power of 5 mW. The wavelength of the light is 671 nm. How many photons per second does this laser emit (in 1/s)?
I dont really know where to start on this. I calculated hc/lambda= 2.96e-19, and that is all I have. Id like to be guided through the problem rather than just given the answer if possible, but any help is greatly appreciated.
Thanks

Photon per sec = P/E. Sometimes, for problems like these, it's helpful to try and solve for the correct units with what you are given. You have J (for the individual photon) and J/s for the power. (J/s)/J = 1/s.

E=2.96*10^-19
P=5*10^-3 W

P/E = 1.7*10^16 photons/sec

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