Which of these lamps has no mercury content?
A) fluorescent lamp
B) CFL
C) incandescent lamp
D) none of the above
Correct Answer:
Verified
Q60: Fraunhofer lines are apparent in
A)absorption spectra.
B)emission spectra.
C)Doppler
Q61: Which of these lamps employs semi-conductor technology?
A)incandescent
Q62: To keep chickens in a chicken coop
Q63: Light from a laser is
A)monochromatic.
B)in phase.
C)coherent.
D)all of
Q64: Argon rather than air is the gas
Q66: The efficiency of classroom-demonstration lasers is typically
A)about
Q67: The absorption of an infrared photon that
Q68: A watch dial that continues to glow
Q69: A laser cannot emit more energy than
Q70: White-light LEDs employ
A)phosphors.
B)white-emitting diodes.
C)extra-high electrical barriers.
D)none of
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents