The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 179
... luminescence and incandes- cence become indistinguishable . Luminescent pigments and dyes . Nonluminescent pig- ments and dyes exhibit colours because they absorb white light and reflect that part of the spectrum that is comple- mentary ...
... luminescence and incandes- cence become indistinguishable . Luminescent pigments and dyes . Nonluminescent pig- ments and dyes exhibit colours because they absorb white light and reflect that part of the spectrum that is comple- mentary ...
Page 183
... luminescence decay of a great number of luminescent materials ; e.g. , calcium tungstate . Increase of activation energy for nonradiative deactiva- tion of excited - centres luminescence decay can be achieved by changing the host ...
... luminescence decay of a great number of luminescent materials ; e.g. , calcium tungstate . Increase of activation energy for nonradiative deactiva- tion of excited - centres luminescence decay can be achieved by changing the host ...
Page 185
... luminescence emission must be regarded on an energy and a quantum basis . When every exciting photon yields an ... luminescence ef- ficiency is 100 percent with respect to input energy as well as to the number of quanta . When the number ...
... luminescence emission must be regarded on an energy and a quantum basis . When every exciting photon yields an ... luminescence ef- ficiency is 100 percent with respect to input energy as well as to the number of quanta . When the number ...
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