What is Lasers: Definition and 221 Discussions

Lasers is the third studio album by American rapper Lupe Fiasco, released on March 7, 2011 by Atlantic Records. Production for the album took place between 2008 and 2010. Lasers features production by The Audibles, The Neptunes, Needlz, Alex da Kid, Syience, and long-time collaborator Soundtrakk, among others. Trey Songz, John Legend, Skylar Grey, Sway, Matt Mahaffey, MDMA, Eric Turner and Sarah Green contribute vocals to the album.
Lasers was preceded by the lead single "The Show Goes On" and its follow-up "Words I Never Said" featuring Skylar Grey. The former became Fiasco's highest charting song on the Billboard Hot 100 and has been certified double Platinum in the US. The latter, however, only achieved moderate success on the Hot 100.
The album has received "mixed reviews" from most major music critics, having a score of 57 out of 100 at the review aggregator Metacritic. It fared well commercially however, debuting at number one on the US Billboard 200 with first-week sales of over 200,000 copies sold, making the album Fiasco's second top ten album as well as his highest entry on the chart.

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  1. dedesperado

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    From what distance does the diffuse radiation of a „hair removal laser“ cease to be a threat? I apologize for the peculiar question, but I'm curious about the following matter: I walked past the window of a hair removal studio about 50 meters away earlier, and I noticed repeated bright red...
  2. Daniel Petka

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  3. pallab

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  4. M

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  5. redirmigician

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  6. X

    B Multimode optical fiber, physics beginner help :D

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  7. J3J33J333

    I Can you put out a fuse (fire) with a laser?

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  8. M

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  9. Melbourne Guy

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  10. J

    B How far do photons travel inside common lasers?

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  11. jk22

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  12. B

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  13. D

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  14. DaveE

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  15. S

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  16. JPLphys

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  17. M

    I Understanding Lasers: Questions and Answers

    I am sorry if these questions are basics, but I am not sure I totally understand the basics of how a laser works and the books I read are not totally clear for me, so any explanation would be greatly appreciated. So assuming we have a plane mirrors cavity and a gain medium in between, we create...
  18. DariusP

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  19. T

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  20. S

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    Many papers about random lasers mention the Q-factor of random lasers. Since a random laser has multiple peaks close to each other like shown in the figure. Does each of these peaks correspond to a unique random lasing mode, or is it just a single mode? Similarly what is the right way to...
  21. Vajhe

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    Hi, I have been reading the Milonni and Eberly book "Laser": in one of the chapters they discuss the Oscillator Model. The treatment is quite straightforward, the Hamiltonian of the process is H=H0+HI where the first term is the "undisturbed" hamiltonian, and the second one is the interaction...
  22. gibberingmouther

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  23. DariusP

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    Hello, I wanted to ask about thermal lensing. Thermal lensing is when a temperature gradient from the center of the medium to the outermost part of the medium is created. This causes a varying refractive index throughout the medium. What I want to ask is: Why is the core of the rod(or any other...
  24. R

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    My question is about the relative eye safety of infrared (##\lambda \gtrsim 1400 \ nm##) and ultraviolet (##\lambda \lesssim 300\ nm##) lasers. Both of these wavelengths are highly absorbed by the pre-retinal water content in the cornea, so they don't really penetrate into the retina. So one...
  25. S

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    Can a setup be made such that the efficiency of spontaneous parametric downconversion approaches 100%? From what I have been told, this would be possible using classical input fields matching both the pump and output frequencies, but I am unsure if one could simply use laser of both frequencies...
  26. T

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    From a practical standpoint, can we combine two (or more) lasers tuned to almost-but-not-quite identical frequencies to create distance-specific illumination? For instance, say we have a 1 micron laser and a 0.9999 micron laser which we combine through some beam-combiner optics. In theory I...
  27. C

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  28. S

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  29. Phantoful

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  30. Physics345

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  31. J

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  32. K

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  33. K

    I Beyond LHC, future particle colliders and lasers

    With LHC currently at 13TEV design energy, and a planned higher luminosity upgrade, is the current plan to double the magnet strength for the current existing LHC to arrive at a 28-33TEV collider, or is it building a completely new future 100 TEV collider near Geneva where LHC is housed but in...
  34. J

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    Say you have a red laser and pointed it at a ~175 nm antenna, then amplified the signal into a speaker. Would you then theoretically get a very high frequency audio signal (in the terahertz range, i realize this isn't practical)? My question is really on the nature of the light emitted from...
  35. Evanish

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    I was reading a news article about powerful lasers being used in missile defense systems, and I was wondering if multiple weak laser can work together to do the same job as one strong laser. For example can a thousand 1 Kw lasers in different locations be made to point at a single point on a...
  36. Observeraren

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  37. I

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  38. Twigg

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  39. S

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  40. R

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  41. M

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  42. Dovla

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  43. L

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  44. A

    Choose a technology such as MP3 plays, lasers....

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  45. D

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  46. H

    B Spectroscopy before tunable lasers?

    how was it done?
  47. F

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  48. R

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  49. D

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  50. P

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