Question

what does the term phosphorescence mean.

Answer 1

Phosphorescence is a specific type of photoluminescence that is caused
by the
absorption of radiation at one wavelength followed by delayed
reradiation at
a different wavelength and that continues for a
noticeable time after the
incident radiation stops. In simple terms,
phosphorescence is a process in
which energy absorbed by a substance
is released relatively slowly in the
form of light.