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WorksheetsLuminescence
Total questions: 15
Worksheet time: 10mins
Luminescence is emission of light by certain materials when they are relatively ... .
(a)
Where can you not see luminescence?
incandencent lamps
glowworms
lightning
fluorescent lamps
The first investigations of luminescence began with ...
an organic material
a polymer
a synthetic material
an inorganic material
Today, the name ... is used for the chemical element only.
(a)
Zinc sulfide is...
a phosphor
phosphorus
Luminescence emission ... after an appropriate material has absorbed energy from a source such as ultraviolet or X-ray radiation, electron beams, chemical reactions, and so on.
(a)
The absorbed energy is liberated in the form of …
ultraviolet radiation
nuclear energy
light or heat or both
X-ray radiation
Phosphorescence means light emission caused by electronic transitions between levels of ... multiplicity.
(a)
Fluorescence is used for light emission connected with electronic transitions between levels of ... multiplicity.
(a)
The name luminescence has been accepted for all light emitting phenomena not caused by a rise of ... .
(a)
The practical value of luminescent materials lies in their capacity to transform energy into ... light.
(a)
Within photoluminescence we’ll explore the process of fluorescence and bioluminescence.
True
False
After energy absorption first, ... occurs.
energy level jump
photon emittance
energy level fall
Photoluminescence and chemiluminescence are the only types of luminescence.
True
False
What kind of luminescence does the anglerfish possess?
(a)
