All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Science
Ultrashort colour (Posted on 2006-10-06) Difficulty: 4 of 5

Recently physicists have managed to build "attosecond lasers", lasers which emit pulses 10-18 seconds long, interrupted by much longer periods of darkness (at least 10-14 seconds). Before them, lasers emitting femtosecond (10-15 seconds) pulses have been around. Assuming they produce visible light, what colour is it?

See The Solution Submitted by vswitchs    
Rating: 3.7500 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
not that simple | Comment 12 of 15 |
Attosecond pulses require loads of bandwidth to produce (many wavelengths).  The fundamental misunderstanding with this problem is that the duration of the pulse is equal to 1/(de Broglie frequency), but in fact there many wavelength components winthin 1 attosecond or any other ultrashort pulse for that matter. The answer to this is more of a solid state physics problem of natural harmonics of crystals used as the lasing medium, etc.
http://www.mpq.mpg.de/lpg/research/attoseconds/attosecond.html

  Posted by jake on 2006-11-15 12:41:11
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (10)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information