WorksheetsLasers in Periodontics
Total questions: 15
Worksheet time: 8mins
The type of emission of light on its own is called
Spontaneous emission
Stimulated emission
triggered emission
none of the above
Full form of LASER
Light Amplification by Spontaneous Emission of Radiation
Light Amplification by Stimulated Emission of Radiation
Light Attenuation by Stimulated emission of Radiation
None of the above
Which is not a characteristic of LASER?
Monochromatic
Directionality
Multiple Wavelength
High Intensity
Acronym for LASER is
Light Absorption by Stimulated Emission of Radiation
Light Amplification by Stimulated Emission of Radiation
Light Alteration by Stimulated Emission of Radiation
Light Attenuation by Stimulated Emission of Radiation
Which of the following statements are true?
- LASER is used as optical source in single mode fibers.
- LASER lights are highly incoherent.
1. is true and 2. is false
1. is false and 2. is true
Both 1 & 2 are true
Both 1 & 2 are false
Light amplification in LASER is achieved by
Population inversion
Stimulated emission
Spontaneous emission
Pumping
Laser is a coherent source of light. This means all the light waves....
are out of phase
are in phase
have different directions
have same direction
Laser is a monochromatic source of light. This means all the light waves have...
same wavelength
same phase
same intensity
same direction
The first laser was built in...
1920
1940
1960
1980
Population inversion means
Number of atoms in excited state are equal to the number of atoms in the ground state.
Number of atoms in excited state are more than the number of atoms in the ground state.
Number of atoms in excited state are less than the number of atoms in the ground state.
No atom in excited state.
Which of the following property is a property of laser?
Directional
Monochromatic
Coherence
Divergent
What is the process responsible for producing photons in diode laser?
Fermi level shift
Majority carrier injection
Carrier freeze out
Electron-hole recombination
What are three types of Laser?
gas,solid,diode
diode,inverted,pointer
gas,metal vapor,rock
pointer,diode,CD
The atoms _______ energy to raise from a lower energy level to upper energy level
release
absorbs
produce
none of the above
