Which principle does fiber optics work on?
a) Diffraction
b) Reflection
c) Total internal reflection
d) Refraction
What is the core of an optical fiber made of?
a) Copper
b) Glass or plastic
c) Aluminum
d) Rubber
Which component of an optical fiber prevents light from escaping?
a) Cladding
b) Core
c) Jacket
d) Buffer
What is the primary advantage of fiber optic cables over copper cables?
a) Lower cost
b) Higher speed and bandwidth
c) Heavier weight
d) Higher electrical conductivity
Which type of laser is commonly used in fiber optic communication?
a) CO₂ laser
b) Semiconductor laser
c) Ruby laser
d) Excimer laser
What does LASER stand for?
a) Light Amplification by Stimulated Emission of Radiation
b) Light Absorption by Stimulated Energy Reflection
c) Light Amplification by Scattered Energy Radiation
d) Light Application by Stimulated Emission of Rays
Which of the following is NOT a characteristic of laser light?
a) Monochromatic
b) Coherent
c) Divergent
d) Directional
What is the main function of fiber optic cables in telecommunications?
a) Transmitting sound waves
b) Carrying optical signals
c) Conducting electricity
d) Storing data
Which type of optical fiber is used for long-distance communication?
a) Multimode fiber
b) Single-mode fiber
c) Plastic fiber
d) Hybrid fiber
What is the main advantage of single-mode fiber over multimode fiber?
a) Higher bandwidth and longer distance transmission
b) Lower cost
c) Uses LED instead of lasers
d) Works better in shorter distances
Which part of a laser controls the amplification of light?
a) Optical cavity
b) Power source
c) Mirrors
d) Cooling system
Which laser type is most commonly used in medical surgeries?
a) CO₂ laser
b) Helium-neon laser
c) Semiconductor laser
d) Dye laser
Which optical component splits light in fiber optic systems?
a) Coupler
b) Diode
c) Modulator
d) Attenuator
What is dispersion in fiber optics?
a) The bending of light
b) The spreading of light pulses over time
c) The absorption of light
d) The increase in signal strength
Which gas is used in helium-neon lasers?
a) Helium and neon
b) Oxygen and nitrogen
c) Hydrogen and helium
d) Carbon dioxide and argon
Which type of laser is used in barcode scanners?
a) Ruby laser
b) Helium-neon laser
c) CO₂ laser
d) Dye laser
Which application does NOT use fiber optics?
a) Internet communication
b) MRI scanning
c) Endoscopy
d) Electrical wiring
What is an optical fiber’s outermost protective layer called?
a) Cladding
b) Core
c) Jacket
d) Coating
Which of the following is NOT a benefit of fiber optics?
a) Immunity to electromagnetic interference
b) High data transmission speed
c) Unlimited bending capability
d) Low signal loss
Which of these is an advantage of lasers in medical applications?
a) Causes more damage to surrounding tissues
b) Provides high precision cutting
c) Cannot be used in eye surgeries
d) Always requires anesthesia
What is the main cause of signal loss in fiber optic cables?
a) High voltage
b) Scattering and absorption
c) Electrical interference
d) Short cable length
Which type of laser is used in CD/DVD players?
a) Semiconductor laser
b) Ruby laser
c) CO₂ laser
d) Helium-neon laser
Which component of a fiber optic cable helps prevent signal loss?
a) Cladding
b) Diode
c) Mirror
d) Power supply
Which type of optical fiber has a larger core diameter?
a) Single-mode fiber
b) Multimode fiber
c) Hybrid fiber
d) None of these
Which factor affects the speed of light in fiber optics?
a) Refractive index
b) Electrical resistance
c) Temperature
d) Humidity
What happens when a laser beam is focused on a small area?
a) The intensity increases
b) The intensity decreases
c) The beam disperses
d) The wavelength changes
Which laser is commonly used for eye surgeries?
a) Excimer laser
b) Ruby laser
c) Dye laser
d) Fiber laser
What role does an optical amplifier play in fiber optic communication?
a) Reduces dispersion
b) Increases signal strength without converting it to electrical signals
c) Slows down data transmission
d) Converts signals into electrical pulses
Which of the following is NOT a property of laser light?
a) Coherence
b) High divergence
c) Monochromaticity
d) Directionality
Which of the following is NOT a common use of lasers?
a) Communication
b) Welding
c) Optical storage devices
d) Cooling electronic circuits
