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WorksheetsLASER Physics
Total questions: 15
Worksheet time: 8mins
One quantum of light energy is called a (a)
What is the only type of EM waves the human eye can see?
Radio waves
Light waves
Visible light
Gamma ray waves
Light waves are ____________ waves.
Transverse
Compressional
Longitudinal
Electromagnetic
What is the weight of a 20kg box on the earth?
2 N
20 N
200 N
2000 N
THE ACCELERATION DUE TO GRAVITY DOES NOT DEPEND ON
MASS OF THE OBJECT
MASS OF EARTH
RADIUS OF EARTH
HEIGHT ABOVE EARTH SURFACE
According to Einstein at equilibrium
Rate of absorption of radiation is equal to rate of stimulated emission
Rate of spontaneous emission is equal to rate of stimulated emission
Rate of absorption of radiation is equal to rate of spontaneous emission
Rate of stimulated emission is constant
Population inversion for Lasing action means
More electrons in ground state than excited state
More electrons in any excited state than ground state
More electrons in 1st excited than ground state
More electrons in metastable state than ground state
In Ruby Laser the active energy levels are provided by
Aluminimum
Cromium
Both Al2O3 and Cr3+
by oxygen layers
In He-Ne laser active energy levels for transitions are provided by
Ne atoms
He atoms
Both He and Ne
Co2 atoms
LASING action depends on
Spontaneous emission
Stimulated emission
Spontaneous emission followed by stimulated emissions
Absorption of radiation
