Final answer:
Inside a laser apparatus, the stimulation and relaxation of electrons in atoms causes many photons with the same wavelength to be continuously emitted. Option c is correct.
Step-by-step explanation:
Inside a laser apparatus, the stimulation and relaxation of electrons in atoms causes many photons with the same wavelength to be continuously emitted. When the electrons in the atoms are stimulated to higher energy levels and then relax back to lower energy levels, they release energy in the form of photons. These photons have the same wavelength because they are emitted during the same energy transition. This is what allows a laser to produce a highly coherent and monochromatic beam of light.
Inside a laser apparatus, the stimulation and relaxation of electrons in atoms causes many photons with the same wavelength to be continuously emitted. This is due to the process of stimulated emission, where an incoming photon of a particular frequency can stimulate an excited electron to fall to a lower energy level, emitting a photon of the same frequency, phase, and direction as the stimulating photon. Consequently, a cascade of photons with a matching wavelength is produced, leading to the powerful and coherent output of a laser beam.