Multiple Choice
The major difference between phosphorescent and fluorescent materials is
A) a time delay between excitation and de-excitation.
B) a difference in brightness.
C) the greenish color of phosphorescence.
D) none of the above
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q21: The white light emitted by a fluorescent
Q22: Spectral lines take the shape of vertical
Q23: The dark lines in the Sun's spectrum
Q24: Astronomers can tell whether a light source
Q25: An atom that absorbs a certain amount
Q27: Which of the following continually emits electromagnetic
Q28: Light at the peak frequency of an
Q29: Argon rather than air is the gas
Q30: Which of these lamps has no mercury
Q31: Some minerals glow when illuminated with ultraviolet