laser and applications

What are three types of Laser?

• gas,solid,diode

• diode,inverted,pointer

• gas,metal vapor,rock

• pointer,diode,CD

Example of solid state laser is

• He-Ne laser

• $co_2$ laser

• Nd:YAG Laser

• Dye laser

which is an application of laser?

• medical application 
• Communication 
• cutting metals
• all of the above 

Which type of laser is best suited for use in CD/DVD players?

• gas laser

• laser diode

• solid-state laser

• excimer laser

Lasers are used for a variety of applications. Which of the following is an example of areas that lasers are used.

• commercial fields

• scientific fields

• medical applications

• all of the above

Acronym for LASER is

• Light Absorption by Stimulated Emission of Radiation

• Light Amplification by Stimulated Emission of Radiation

• Light Alteration by Stimulated Emission of Radiation

• Light Attenuation by Stimulated Emission of Radiation

Which of the following statements are true?

1. LASER is used as optical source in single mode fibers.
2. LASER lights are highly incoherent.

• 1. is true and 2. is false

• 1. is false and 2. is true

• Both 1 & 2 are true

• Both 1 & 2 are false

Naturally occuring process in a LASER is

• Stimulated Emission

• Absorption

• Spontaneous Emission

• Population Inversion

The process in which the electrons in the ground state are vibrated to the excited states by providing extra energy from energy sources is called as

• Population Inversion

• Spontaneous emission

• Stimulated emission

• Pumping

The coherent nature of light from LASER is due to

• Spontaneous emission

• Stimulated Emission

• Absorption

• Pumping