Physics Exam 4: Laser Safety Exam
Questions and Answers
Laser - Correct Answers -A device that emits a highly controlled continuous beam of
coherent, monochromatic light.
Light amplification by stimulated emission of radiation - Correct Answers -LASER
Energy levels - Correct Answers -Specific levels in an atom or molecule where electrons
can occupy and jump between.
Photon - Correct Answers -A particle of light emitted when an electron drops to a lower
energy level in an atom.
Monochromatic - Correct Answers -Having only one wavelength of light.
Coherent - Correct Answers -Oscillating in the same phase, with all photons moving
together.
Collimated - Correct Answers -A narrow, parallel beam of light that can be directed
precisely.
Argon laser uses - Correct Answers -Detached retina, liver resections, glaucoma
surgery, basal cell carcinoma (used where high need for coagulation)
YAG laser - Correct Answers -A laser that emits infrared radiation weakly absorbed by
tissue, used for phototherapy, coagulation, and kidney stone treatment. Deeper
penetration than CO2 but shorter wavelength; effects not apparent for days after
exposure
Holmium laser - Correct Answers -Type of YAG; combines CO2 and YAG AKA cuts and
coagulates tissue, good for endoscopic surgery and breaking up kidney stones
Thulium laser - Correct Answers -A continuous wave laser operating at a wavelength of
approximately 2000 nm, uncommon
Excimer laser - Correct Answers -A UV gas emitting laser that produces a precise
energetic beam, used for corrective eye surgery (LASIK). Does not burn or cut tissue
Laser eye protection - Correct Answers -Protective eyewear designed to block specific
wavelengths of laser light. Based on the type of laser being used
Questions and Answers
Laser - Correct Answers -A device that emits a highly controlled continuous beam of
coherent, monochromatic light.
Light amplification by stimulated emission of radiation - Correct Answers -LASER
Energy levels - Correct Answers -Specific levels in an atom or molecule where electrons
can occupy and jump between.
Photon - Correct Answers -A particle of light emitted when an electron drops to a lower
energy level in an atom.
Monochromatic - Correct Answers -Having only one wavelength of light.
Coherent - Correct Answers -Oscillating in the same phase, with all photons moving
together.
Collimated - Correct Answers -A narrow, parallel beam of light that can be directed
precisely.
Argon laser uses - Correct Answers -Detached retina, liver resections, glaucoma
surgery, basal cell carcinoma (used where high need for coagulation)
YAG laser - Correct Answers -A laser that emits infrared radiation weakly absorbed by
tissue, used for phototherapy, coagulation, and kidney stone treatment. Deeper
penetration than CO2 but shorter wavelength; effects not apparent for days after
exposure
Holmium laser - Correct Answers -Type of YAG; combines CO2 and YAG AKA cuts and
coagulates tissue, good for endoscopic surgery and breaking up kidney stones
Thulium laser - Correct Answers -A continuous wave laser operating at a wavelength of
approximately 2000 nm, uncommon
Excimer laser - Correct Answers -A UV gas emitting laser that produces a precise
energetic beam, used for corrective eye surgery (LASIK). Does not burn or cut tissue
Laser eye protection - Correct Answers -Protective eyewear designed to block specific
wavelengths of laser light. Based on the type of laser being used
