CHEM 648 | Questions with 100% Verified Answers | Latest
Update 2026/2027
Question: What does the velocity and wavelength of radiation depend
on?
Answer:
the medium (frequency is fixed)
Question: specular reflection
Answer:
any irregularities are small compared to wavelength
Question: Brewster's angle
Answer:
Happens when the transmitted ray is 90° to the reflected ray. The angle gives us the angle
of incidence needed for plane-polarized light.
Question: three components of a laser
Answer:
gain medium, optical cavity, energy supplied to gain medium
Question: photoelectric effect
Answer:
The emission of electrons from a metal when light shines on the metal
Question: population inversion
Answer:
a necessary condition for laser operation, in which more members of a collection of
atoms are in an excited state than are in lower energy states (thus allows for stimulated
emission to dominate)
Question: stimulated emission
Answer:
process of photon emission by stimulation of already excited atoms
Update 2026/2027
Question: What does the velocity and wavelength of radiation depend
on?
Answer:
the medium (frequency is fixed)
Question: specular reflection
Answer:
any irregularities are small compared to wavelength
Question: Brewster's angle
Answer:
Happens when the transmitted ray is 90° to the reflected ray. The angle gives us the angle
of incidence needed for plane-polarized light.
Question: three components of a laser
Answer:
gain medium, optical cavity, energy supplied to gain medium
Question: photoelectric effect
Answer:
The emission of electrons from a metal when light shines on the metal
Question: population inversion
Answer:
a necessary condition for laser operation, in which more members of a collection of
atoms are in an excited state than are in lower energy states (thus allows for stimulated
emission to dominate)
Question: stimulated emission
Answer:
process of photon emission by stimulation of already excited atoms
