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-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-5

An electron in ground state is

• unstable

• stable

• fluctuating

• vigorous

The atoms _______ energy to raise from a lower energy level to upper energy level

• release

• absorbs

• produce

• 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 responsible for laser action

• Spontaneous emission

• Stimulated emission

• Attenuation

• Absorption

Tags

NGSS.HS-PS4-3

The rate of absorption transition R_abs depends on

• ρ(ν) and N₁

• ρ(ν) only

• N_{1 only}

• none of the above

The rate of spontaneous emission R_sp depends only on

• N₁

• N₂

• ρ(ν)

• none of the above

The picture indicates which property ? 

• Laser is Monochromatic 
• Laser is Coherent
• Laser is Directional 

Tags

NGSS.HS-PS4-5

Example of solid state laser is

• He-Ne laser

• Nd:YAG Laser

• Dye laser

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5