Grade 12th pass10 grade science
A set of atoms in an excited state decay
(A) in general, to any of the states with lower energy
(B) into a lower state only when excited by an electric field
(C) all together simultaneously in a lower state
(D) to emit photons only when they collide
A set of atoms in an excited state decay
(A) in general, to any of the states with lower energy
(B) into a lower state only when excited by an electric field
(C) all together simultaneously in a lower state
(D) to emit photons only when they collide
