Laser

LASER Stands For

• Light Amplification by Spontaneous Emission of Radiation

• Light Attenuation by Stimulated emission of Radiation

• Light Amplification 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

• Stable

• Unstable

• fluctuating

• vigorous

The phenomenon of Stimulated Emission of Radiation was predicted by

• Albert Einstein

• Max Planck

• Newton

• Max Born

In stimulated Emission, what is the lifetime of atoms ground state?

• Infinity

• 1 second

• 1 minitue

• 1 hour

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

• Absorption

• Emission

The type of emission of light on its own is called

• Stimulated emission

• Spontaneous emission

• triggered emission

• none of the above

The process of Stimulated emission causes

• loss of photons

• multiplication of photons

• no radiation

• 
  scattering of light

The process responsible for laser action

• Spontaneous emission

• Stimulated emission

• Attenuation

• 
  Absorption