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WorksheetsLasers Practice 1
Total questions: 10
Worksheet time: 5mins
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
The light intensity decreases __________ with distance in the medium
Exponentially
parabolically
steeply
none of the above
An electron in ground state is
unstable
stable
fluctuating
vigorous
The passing of an electron from one energy level to another within the atom is called
quantum transition
quantum mechanics
atom transfer
resonant transfer
The number of atoms per unit volume that occupy a given energy state is called
population
meta stable state
active state
none of the above
The atoms _______ energy to raise from a lower energy level to upper energy level
release
absorbs
produce
none of the above
The process responsible for laser action
Spontaneous emission
Stimulated emission
Attenuation
Absorption
The rate of spontaneous emission Rsp depends only on
N1
N2
ρ(ν)
none of the above
This is NOT a feature of spontaneous emission
it is essentially probabilistic in nature
The light spreads in all direction
It is not controllable from outside
The light is highly monochromatic
