LASERS

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

Tags

NGSS.HS-PS4-5

Which is not a characteristic of LASER?

• Monochromatic

• Directionality

• Multiple Wavelength

• High Intensity

Tags

NGSS.HS-PS4-5

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 type of emission of light on its own is called

• Spontaneous emission

• Stimulated emission

• triggered emission

• none of the above

The process of Stimulated emission causes

• loss of photons

• scattering of light

• multiplication of photons

• no radiation

Tags

NGSS.HS-PS4-3

The process responsible for laser action

• Spontaneous emission

• Stimulated emission

• Attenuation

• Absorption

Tags

NGSS.HS-PS4-3

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

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Find the feature of stimulated emission

• Light attenuation

• Incoherent light

• Light amplification

• Non directional

Tags

NGSS.HS-PS4-5

Laser light is much _____ than natural light.

• weaker

• stronger