Physics Exam 4: Laser Safety UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Laser - CORRECT ANSWER - A device that emits a highly controlled continuous beam of
coherent, monochromatic light.
Light amplification by stimulated emission of radiation - CORRECT ANSWER - LASER
Energy levels - CORRECT ANSWER - Specific levels in an atom or molecule where
electrons can occupy and jump between.
Photon - CORRECT ANSWER - A particle of light emitted when an electron drops to a
lower energy level in an atom.
Monochromatic - CORRECT ANSWER - Having only one wavelength of light.
Coherent - CORRECT ANSWER - Oscillating in the same phase, with all photons moving
together.
Collimated - CORRECT ANSWER - A narrow, parallel beam of light that can be directed
precisely.
Ground state - CORRECT ANSWER - The lowest energy level that an electron can
occupy in an atom or molecule.
Thermal effects - CORRECT ANSWER - Effects caused by the absorption of laser light by
tissue, resulting in heat.
ACTUAL Exam Questions and CORRECT
Answers
Laser - CORRECT ANSWER - A device that emits a highly controlled continuous beam of
coherent, monochromatic light.
Light amplification by stimulated emission of radiation - CORRECT ANSWER - LASER
Energy levels - CORRECT ANSWER - Specific levels in an atom or molecule where
electrons can occupy and jump between.
Photon - CORRECT ANSWER - A particle of light emitted when an electron drops to a
lower energy level in an atom.
Monochromatic - CORRECT ANSWER - Having only one wavelength of light.
Coherent - CORRECT ANSWER - Oscillating in the same phase, with all photons moving
together.
Collimated - CORRECT ANSWER - A narrow, parallel beam of light that can be directed
precisely.
Ground state - CORRECT ANSWER - The lowest energy level that an electron can
occupy in an atom or molecule.
Thermal effects - CORRECT ANSWER - Effects caused by the absorption of laser light by
tissue, resulting in heat.
