A laser is the device itself, the beam is.. well, the beam coming out of the laser.
It is able to calculate the time it takes for a woman to orgasm :)
no they do not
Laser beams are coherent (all photons are in phase), monochromatic (all photons are the same wavelength or color) and they are usually highly collimated (all photons are traveling parallel to each...
A: By applying to a laser diode pulse of current enough energy to emit photons at a certain frequency.