WorksheetsLASER 2
Total questions: 25
Worksheet time: 19mins
When a beam of light enters one medium from another, which quantity will not change?
Direction
Speed
Frequency
Wavelength
Dispersion is used to describe the
Splitting of white light into its component colors
Propagation of light in straight lines
Bending of a beam of light when it goes from one medium to another
Bending of a beam light when it strikes a mirror
The wavelength of light has no role in
Diffraction
Interference
Polarization
Reflection
Laser light is ______ emission.
Coherent
Stimulated
Spontaneous
Coherent and stimulated
Which of the following factor does not harm laser efficiency?
Atmospheric absorption
Excitation energy not absorbed
Problems in depopulating the lower laser level
Inefficiency in populating the upper laser level
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
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
An atom is stimulated from the state of energy 1.34 x 10-34J to an excited level of 7.62 x 10-34J. What is the frequency of the stimulating photon? (a)
Pumping technique employed in Ruby laser is (a)
Pumping technique employed in gas laser is (a)
Pump technique employed in semiconductor laser is (a)
The first laser demonstrated in the year 1960 was (a)
(a) is the first molecular gas laser?
In gas lasers the output power is directly proportional to (a)
Which is used for drilling fine holes in diamond?
(a)
Example for spontaneous emission is (a)
Example for stimulated emission is (a)
Which property of the laser is used in eye surgery?
(a)
In (a) state life time of the atom is very less
