Will the Green Laser Pointer Replace the Red Laser Pointer?
Sony announced that it has ceased production of the cassette tape Walkman in Japan on Monday 25th October. It means the death of the Walkman after thirty-one years history. It shows that the Walkman was finally replaced by the digital Mp3 players and iPods. The Walkman was launched in July 1979. From then on, transistor radios were portable. The music fans found a good way to bring their music anywhere at anytime. The news to quit the cassette tape may not be good to the fans of Walkman. It records a lot of sweet memory of their life. Through this issue, someone would question that if the green laser pointer would replace the red green laser one day.
Nowadays more and more people prefer to choose laser pointer as their toys or tools. The laser pointer is quite useful in astronomy area to point the stars. It is also quite helpful when teaching. Or you may use it to make your presentation more vivid. There are three main kinds of laser pointers. The most common one is red laser pointer. And the more powerful one is green laser pointer. There is another laser pointer is blue. And some body prefers to choose the red green laser, while the others may like the green laser or blue laser. What are the differences between the red laser pointer and green laser pointer?
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