is laser lights visible? i recently saw a laser show in a hotel. i thought laser is invisible. how cud a coherent, high intense beam of laser be visible?
thanks
The optical wavelengths (0.4um to 0.7um), this is the range of the visible light. However, we don't use these wavelengths in optical communications due to the high attenuation.
The wavelength usually used is 1.55um which near infrared(invisible).
LASER=light amplification of stimulated emission of radiation..
above process can be done on visible and also on invisible light..the resultant is LASER which can be visible and can also be invisible..
Think of it this way, the light from lasers is caused by stimulated emissions of electrons from the conduction band to the valence band. When this happens photons are released, therefore, light is release for sure. The question is whether its frequency is in the range our eyes can see.
Think of it this way, the light from lasers is caused by stimulated emissions of electrons from the conduction band to the valence band. When this happens photons are released, therefore, light is release for sure. The question is whether its frequency is in the range our eyes can see.
if the light is invisible, and it is made laser, then the laser will be invisible..
if the light is visible, then the laser made of it will also be visible..