The white light emitted by a fluorescent lamp is provided by the
A) mercury vapor in the lamp.
B) phosphors on the inner surface of the lamp.
C) high temperature of the glowing gas.
D) filtering effect of the glass tubing.
Correct Answer:
Verified
Q39: The Doppler effect due to motion of
Q40: If light in a spectroscope passed through
Q41: Some minerals glow when illuminated with ultraviolet
Q42: If the radiation curve for an incandescent
Q43: Astronomers can tell whether a light source
Q45: Helium was first discovered in the
A)laboratory.
B)upper atmosphere.
C)Sun.
D)island
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Q47: For absorption spectra to exist
A)the light source
Q48: The dark lines in the Sun's spectrum
Q49: Fluorescent minerals on display in museums are
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