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As pullbangdead said, if the question is just which is better to burn a red match, red or green, then green is better of course. If you are reffering to a more general question - which laser is better for burning something - then of course it depends on what you want to burn with it. But I would...

Have fun. :friend:

25 years old:)

Nice pics! Enjoy it!

Interesting tutorial ... for experts:P. I will try to catch my ears in similar lab project

17 USD. It's ok the price? I want to buy ten pieces

Too bad that domain name is very long already. They say a good domain indexed by Google involves a rapid indexing subdomains.

Good one!

Hello, my name is John Dacu and I am physics student. Hope to clarify some things here with you!

I think about the possibility of purchasing some IR windows for several electrical panels and a rack of network equipment, because there were few incidents in the company over time and try to avoid them. The alternative for the windows ar IR cameras from what I know, but my sources tell me they...

I believe that the universe is finite. That's because I believe in big bang theory and it is obvious that with a finite speed of propagation and a finite time , universe could not stretch to infinity

I understand now ... sorry for my stupid questions. At least you made me a wiser man

what do you mean by "the color is important only related to the color of the object"? You mean contrast?

I found that green lasers have become more popular because they are more visible, but there is a risk of burning paper. This is caused only by the wavelength or higher power involved?

Yes, I asked a broad question. The idea is that i'am going to have some experimental hours in college and i was wondering if after an accident I could get hurt. I guess that in the lab are not very powerful devices used. Someone told me that there is even the risk of cancer if for example the...

Can anyone explain me about this effect? I found the laser can generate chemical reactions in tissues. What are the long-term consequences?