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WorksheetsLASER
Total questions: 15
Worksheet time: 9mins
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
An electron in ground state is
unstable
stable
fluctuating
vigorous
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 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 type of emission of light on its own is called
Spontaneous emission
Stimulated emission
triggered emission
none of the above
The active medium in a He-Ne laser consists of:
Only helium
Only neon
A mixture of helium and neon
A mixture of argon and krypton
Lasers are used in fiber optics communication because they have:
High divergence
High coherence
Low power
Low efficiency
Which of the following components is NOT essential in a laser system?
Active medium
Optical resonator
Pumping source
Prism
What is the function of the optical resonator in a laser?
To amplify the light
To increase the divergence of the beam
To confine and reflect light back into the active medium
To change the wavelength of emitted light
Which property of laser light allows it to travel long distances without significant spreading?
Monochromaticity
Coherence
Collimation
High intensity
What kind of transition is responsible for laser action?
Spontaneous absorption
Spontaneous emission
Stimulated emission
Photon scattering
What is the role of the pumping mechanism in a laser?
To increase the temperature of the system
To create population inversion
To amplify the emitted radiation
To reduce coherence
Which part of the laser system determines the wavelength of emitted light?
Optical resonator
Pumping source
Active medium
Cooling system
Holography uses lasers because of their:
High divergence
High coherence
Low power output
Random phase relations
