Description : Which laser emits light in the visible range 400 to 700 nm? a. Argon-ion b. Nitrogen c. Carbon-dioxide d. Neodymium-YAG
Last Answer : a. Argon-ion
Description : Which type of laser is the simplest to modulate directly by changing its excitation? ∙ a. Semiconductor ∙ b. Ruby ∙ c. Helium-neon ∙ d. Neodymium-YAG
Last Answer : a. Semiconductor
Last Answer : Semiconductor
Description : The wavelength of visible light extends from ∙ a. 0.8 to 1.0 nm ∙ b. 400 to 750 nm ∙ c. 200 to 660 nm ∙ d. 700 to 1200 nm
Last Answer : b. 400 to 750 nm
Description : The wavelength of a visible extends from ∙ A. 0.8 to 1.6 um ∙ B. 400 to 750 nm ∙ C. 200 to 660 nm ∙ D. 700 to 1200 nm
Last Answer : B. 400 to 750 nm
Description : Infrared range for fiber optics ∙ a. 400 – 700 nm ∙ b. 700 – 1200 nm ∙ c. 300 – 2000 nm ∙ d. 400 – 7000 nm
Last Answer : b. 700 – 1200 nm
Description : Infrared light has a wavelength that is ∙ A. less than 400 nm ∙ B. more than 700 nm ∙ C. less than 700 nm ∙ D. a little over 400 nm
Last Answer : B. more than 700 nm
Description : ange of wavelength of visible light ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 390 nm to 770 nm
Last Answer : D. 390 nm to 770 nm
Description : The laser frequency when the light has the wavelength 800 nm is ∙ a. 375 x 1012 Hz ∙ b. 475 x 1015 Hz ∙ c. 375 x 109 Hz ∙ d. 375 x 1018 Hz
Last Answer : d. 375 x 1018 Hz
Description : The first laser emitted ∙ a. Pulses of 694 nm red light ∙ b. A continuous red beam ∙ c. Pulses of white light from a helical flash lamp ∙ d. Spontaneous emission
Last Answer : ∙ a. Pulses of 694 nm red light
Description : It is caused by hydroxide ions in the material ∙ A. visible light absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. ion resonance absorption
Last Answer : D. ion resonance absorption
Description : t is a result of photons of light that are absorbed by the atoms of the glass core molecule. ∙ A. ion resonance absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. visible light absorption
Last Answer : B. infrared absorption
Description : It is caused by valence electrons in the silica material from which the fiber are manufactured. ∙ A. ion resonance absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. visible light absorption
Last Answer : ultraviolet absorption
Description : What generates a light beam of a specific visible frequency? ∙ a. Laser ∙ b. Maser ∙ c. Infrared ∙ d. Flashlight
Last Answer : ∙ a. Laser
Description : Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG
Description : Range of wavelengths of ultraviolet ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 10 nm to 390 nm
Last Answer : D. 10 nm to 390 nm
Description : Range of infrared ∙ A. 360 nm to 440 nm ∙ B. 670 nm to 10^3 nm ∙ C. 110 nm to 240 nm ∙ D. 770 nm to 10^6 nm
Last Answer : D. 770 nm to 10^6 nm
Description : A pn-junction diode emits light by spontaneous emission ∙ A. LED ∙ B. APD ∙ C. PIN
Last Answer : A. LED
Description : The wavelength of visible light extends from a. 0.8 to 1.0 nm b. 400 to 750 nm c. 200 to 660 nm d. 700 to 1200 nm
Description : What is the typical wavelength of light emitted from epitaxially grown LEDs? ∙ a. 840 nm ∙ b. 490 nm ∙ c. 480 nm ∙ d. 940 nm
Last Answer : ∙ d. 940 nm
Description : In refraction that occurs in air/glass interfaces, among the visible light, which is the bent the least? ∙ A. violet ∙ B. blue ∙ C. red ∙ D. orange
Last Answer : C. red
Description : In refraction that occurs in air/glass interfaces, among the visible light, which is bent the most? ∙ A. red ∙ B. violet ∙ C. yellow ∙ D. green
Last Answer : ∙ B. violet
Description : It is the science of measuring only light waves that are visible to the human eye. ∙ A. Radiometry ∙ B. Photometry ∙ C. Ophthalmology ∙ D. Optometry
Last Answer : B. Photometry
Description : Most fiber optic light sources emit light in which spectrum? ∙ A. visible ∙ B. infrared ∙ C. ultraviolet ∙ D. X-ray
Last Answer : B. infrared
Description : The law that states “When visible light of high frequency electromagnetic radiation illuminates a metallic surface, electrons are emitted” is known as ____________. ∙ A. Einstein law of photon ∙ B. Marconi’s law ∙ C. Maxwell’s law ∙ D. Plank’s law
Last Answer : D. Plank’s law
Description : The band of light frequencies that are too low to be seen by the human eye ∙ A. Infrared ∙ B. X-rays ∙ C. Visible ∙ D. Ultraviolet
Last Answer : Ultraviolet
Description : The band of light frequencies to which human eye will respond ∙ A. Infrared ∙ B. Visible light ∙ C. Ultraviolet ∙ D. Cosmic ray
Last Answer : B. Visible light
Description : The band of light frequencies that are too high to be seen by the human eye. ∙ A. Ultraviolet ∙ B. Visible light ∙ C. Infrared ∙ D. Yellow
Last Answer : ∙ C. Infrared
Description : Which of the following colors is not found in the visible light wave spectrum? ∙ a. Red ∙ b. White ∙ c. Orange ∙ d. Yellow
Last Answer : b. White
Description : Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal
Last Answer : ∙ a. It has high losses
Description : Most fiber-optic light sources emit light in which spectrum? ∙ a. Visible ∙ b. Infrared ∙ c. Ultraviolet ∙ d. X-ray
Last Answer : ∙ b. Infrared
Description : The band of light wavelengths that are too short to be seen by the human eye ∙ a. Amber ∙ b. Visible ∙ c. Infrared ∙ d. Ultraviolet
Last Answer : c. Infrared
Description : The band of light wavelengths that are too long to be seen by the human eye ∙ a. Amber ∙ b. Visible ∙ c. Infrared ∙ d. Ultraviolet
Description : ________ is the result of photons of light that are absorbed by the atoms of the glass core molecules ∙ a. Ion resonance absorption ∙ b. Ultraviolet absorption ∙ c. Infrared absorption ∙ d. Absorption loss
Last Answer : c. Infrared absorption
Description : What is the spectral width of an ILD? ∙ A. 0.1 nm to 1 nm ∙ B. 2 nm to 5 nm ∙ C. 1 nm to 3 nm ∙ D. 3 nm to 4 nm
Last Answer : C. 1 nm to 3 nm
Description : What is the spectral width of a standard LED? ∙ A. 20 to 40 nm ∙ B. 30 to 50 nm ∙ C. 10 to 30 nm ∙ D. 40 to 60 nm
Last Answer : 30 to 50 nm
Description : How many modes possible with a multimode step-index with a core diameter of 50 um, a core refractive index of 1.6, a cladding refractive index of 1.584, and a wavelength of 1300 nm. ∙ A. 456 ∙ B. 213 ∙ C. 145 ∙ D. 372
Last Answer : D. 372
Description : The graded-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.5 ∙ b. 0.05 ∙ c. 0.0005 ∙ d. 5
Last Answer : ∙ a. 0.5
Description : A step-index multimode optical fiber has a core diameter of _____ nm. ∙ a. 0.02 ∙ b. 0.2 ∙ c. 2 ∙ d. 0.002
Last Answer : b. 0.2
Description : A single mode optical fiber has a core diameter of _____ nm. ∙ a. 0.1 ∙ b. 0.01 ∙ c. 0.2 ∙ d. 0.05
Last Answer : a. 0.1
Description : Which light emitter is preferred for high-speed data in a fiber-optic system? ∙ A. incandescent ∙ B. LED ∙ C. neon ∙ D. laser
Last Answer : D. laser
Description : They wrote a paper describing how it was possible to use stimulated emission for amplifying light waves (laser) as well as microwaves (maser). ∙ A. Theodore Maiman ∙ B. KC Kao and GA Bockham ∙ C. Charles Townes and Arthur Schawlow ∙ D. Kapron, Keck and Maurer
Last Answer : C. Charles Townes and Arthur Schawlow
Description : Coherence of laser light is important for _________ ∙ a. Light propagation ∙ b. Getting laser light to pass through air ∙ c. Drilling holes ∙ d. Holography
Last Answer : d. Holography
Description : What is used to block light from a laser and let other light through ∙ a. Neutral density ∙ b. Color ∙ c. Interference ∙ d. Spatial
Last Answer : ∙ c. Interference
Description : Laser light is very bright because it is ∙ a. Pure ∙ b. White ∙ c. Coherent ∙ d. Monochromatic
Last Answer : c. Coherent
Description : Which light emitter is preferred for high speed data in a fiber-optic system ∙ a. Incandescent ∙ b. LED ∙ c. Neon ∙ d. Laser
Last Answer : ∙ d. Laser
Description : Which of the following contributes to the broadening of laser emission bandwidth? ∙ a. Doppler shift of moving atoms and molecules ∙ b. Amplification within the laser medium ∙ c. Coherence of the laser light ∙ d. Optical pumping of the laser transition
Last Answer : Doppler shift of moving atoms and molecules
Description : A dielectric waveguide for the propagation of electromagnetic energy at light frequencies ∙ a. Stripline ∙ b. Microstrip ∙ c. Laser beam ∙ d. Fiber optics
Last Answer : d. Fiber optics
Description : Laser light is ______ emission. ∙ a. Coherent ∙ b. Stimulated ∙ c. Spontaneous ∙ d. Coherent and stimulated
Last Answer : ∙ d. Coherent and stimulated