LASER

The acronym LASER stands for...

• light amplification by standart emission of ray

• light amplification by semiconductor emission radiant

• light amplification by stimulated emission of radiation

• low amplification by stimulated emission radiation

Laser is a monochromatic source of light. This means all the light waves have...

• same wavelength

• same phase

• same intensity

• same direction

Albert Einstein discovered the most important process of the laser. What is it?

• Einstein Process

• photon emission

• medium process

• stimulated emission

Pump system needs to raise the atoms from...

• exited state to ground state

• ground state to exited state

• ground state to unexcited state

• excited state to exited state

Red-light laser contain a long crystal made of ...

• agate

• tourmaline

• coral

• ruby

The first laser was built in...

• 1920

• 1940

• 1960

• 1980

The lowest allowable energy state of an atom is known as what?

• ground state

• ionized energy

• absolute zero

• base level

The picture indicates which property ? 

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

Monochromatic means that ?

• the light consist of two colors
• the light consist of only one color
• the light consist of three color
• only two light wavelengths are distinguished

what is laser made from

• photons
• energy
• light
• wind