LASERS CERTIFICATION EXAM ALL QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR

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LASERS CERTIFICATION EXAM ALL
QUESTIONS AND VERIFIED SOLUTIONS
LATEST UPDATE THIS YEAR


QUESTION: In _____ the first dental hard tissue was FDA cleared and is called _______. And the

______ laser a year later. - ANSWER-1997


Er: YAG laser


Er, Cr: YSGG




QUESTION: The word LASER is an acronym standing for _________. - ANSWER-Light

Amplification by Stimulated Emission of Radiation




QUESTION: Laser parameters include what 3 things? - ANSWER-1)Duration of exposure


2)Fiber Diameter


3)Wavelength




QUESTION: Lasers are:




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______chromatic?


_____directional?


coherent or noncoherent?


emitted from a stimulated ____________. - ANSWER-monochromatic: made of a single

wavelength (visible or infrared)


unidirectional


coherent (all peaks and valleys of each wave travel in unison)


active medium




QUESTION: What states can the active medium be in? - ANSWER-solid, gas, semiconductor




QUESTION: What type of active medium is used in Er: YAG? - ANSWER-solid state using crystal

matrix (erbium laced yttrium, aluminum and garnet)




QUESTION: What type of gas is used when the active medium is sealed in an air tight chamber?

- ANSWER-CO2




QUESTION: Diode lasers have what type of active medium? - ANSWER-semiconductor


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QUESTION: what photons form the laser? - ANSWER-light that leaks from the output coupler




Q; Theorized the concept of stimulated emission - ANSWER-Einstein




QUESTION: Theorized that an excited electron will spontaneously return to its ground state -

ANSWER-Bohr




QUESTION: First ruby laser was created in _____ by ______. - ANSWER-1960, Ted Maiman




QUESTION: _________ reported in 1965 that a ruby laser could vaporize enamel. - ANSWER-

Stern and Sognnaes




QUESTION: First pulsed Nd:YAG laser released in ______ and cuts ______ tissue. - ANSWER-

1990, soft tissue




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