Laser is an acronym for light amplification by
A.stimulated emission of radiation
B.spontaneous emission of radiation
C.stimulated energetic radiation
D.spontaneous emission of radio waves
A.stimulated emission of radiation
B.spontaneous emission of radiation
C.stimulated energetic radiation
D.spontaneous emission of radio waves
A.fourth nation of the world
B.fifth nation of the world
C.sixth nation of the world
D.seventh nation of the world
A.Atomic weight
B.Atomic radius
C.Atomic volume
D.Atomic number
A.neutrons
B.protons
C.electrons
D.mesons
A.protons only
B.protons and electrons
C.protons and neutrons
D.protons neutrons and electrons
A.200 Fermi
B.2 Fermi
C.50 Fermi
D.1000 Fermi
A.radium
B.thorium
C.polonium
D.uranium
A.Cd
B.U
C.Pb
D.Fe
A.Atomic number
B.Atomic weight
C.Number of protons
D.Number of electrons
A.hydrogen
B.deuterium
C.tritium
D.helium