Which is true regarding the physical properties of laser light?
A) Laser light is generated by spontaneous emission.
B) Light from a laser scatters like an overhead lamp.
C) The color of laser light depends on the medium through which it travels.
D) Laser light is monochromatic and coherent.

Question

Quizplus · Accepted Answer

Laser light is monochromatic, meaning it has a single frequency/wavelength, and coherent, meaning its waves are in phase with each other. This is because laser light is created by stimulated emission, not spontaneous emission. Laser light also does not scatter like an overhead lamp. The medium through which it travels can affect its absorption and transmission, but not its color.

Which Is True Regarding the Physical Properties of Laser Light