What does LASER stand for?
a) Light Absorption by Stimulated Emission of Radiation
b) Light Amplification by Stimulated Emission of Radiation
c) Light Amplification by Spontaneous Emission of Radiation
d) Light Absorption by Spontaneous Emission of Radiation
Which component of a laser is responsible for providing energy to the active medium?
a) Optical cavity
b) Pumping source
c) Gain medium
d) Beam expander
Which of the following is an example of a gas laser?
a) Ruby laser
b) Nd:YAG laser
c) CO2 laser
d) Semiconductor laser
What is the role of the optical cavity in a laser?
a) Provides energy to the medium
b) Reflects and amplifies light
c) Increases the wavelength of light
d) Converts electrical energy to light
Which type of laser is commonly used in eye surgeries?
a) CO2 laser
b) Excimer laser
c) Dye laser
d) Semiconductor laser
What property of laser light makes it suitable for precise cutting and surgery?
a) High intensity
b) Coherence
c) Monochromaticity
d) All of the above
Which of the following is NOT a characteristic of laser light?
a) Coherence
b) Monochromaticity
c) Divergence
d) High intensity
Which laser is used for barcode scanning in supermarkets?
a) CO2 laser
b) Nd:YAG laser
c) Helium-neon laser
d) Dye laser
In laser technology, what is meant by “population inversion”?
a) More atoms are in the ground state than in the excited state
b) Equal atoms in both energy states
c) More atoms are in the excited state than in the ground state
d) No atoms in the excited state
Which laser type is commonly used in fiber optic communication?
a) Semiconductor laser
b) Ruby laser
c) Gas laser
d) Excimer laser
Which of the following materials is used in a ruby laser?
a) Chromium-doped sapphire
b) Neodymium-doped glass
c) CO2 gas
d) Helium and neon gas
Which of the following applications uses a CO2 laser?
a) Laser hair removal
b) Eye surgery
c) Welding and cutting
d) CD/DVD reading
What is the fundamental principle behind laser operation?
a) Absorption
b) Spontaneous emission
c) Stimulated emission
d) Reflection
Which laser is used for tattoo removal?
a) Argon laser
b) Nd:YAG laser
c) Dye laser
d) Semiconductor laser
Which laser type is commonly used in laser printers?
a) CO2 laser
b) Nd:YAG laser
c) Semiconductor laser
d) Dye laser
Which of the following best describes the output of a laser?
a) Incoherent and divergent
b) Coherent and monochromatic
c) Polychromatic and incoherent
d) Highly divergent and low intensity
Which laser is often used in medical treatments for skin resurfacing?
a) Argon laser
b) CO2 laser
c) He-Ne laser
d) Ruby laser
What is the typical wavelength range of a semiconductor laser?
a) Ultraviolet
b) Visible to infrared
c) X-ray
d) Microwave
Which laser is commonly used in DVD players?
a) He-Ne laser
b) Semiconductor laser
c) Nd:YAG laser
d) Dye laser
Which of the following is NOT an application of lasers?
a) Optical fiber communication
b) Welding and cutting
c) Magnetic resonance imaging (MRI)
d) Barcode scanning
Which type of laser is used in laser pointers?
a) CO2 laser
b) Dye laser
c) Semiconductor laser
d) Excimer laser
What is the primary reason why lasers are used in fiber optic communication?
a) High power output
b) Coherence and directionality
c) Low efficiency
d) High divergence
Which laser is widely used in holography?
a) Excimer laser
b) Dye laser
c) He-Ne laser
d) Nd:YAG laser
Which laser is used for laser-induced breakdown spectroscopy (LIBS)?
a) CO2 laser
b) Nd:YAG laser
c) He-Ne laser
d) Dye laser
Which property of laser light is responsible for its long-range applications?
a) High divergence
b) Coherence
c) Low intensity
d) Polychromatic nature
Which laser is commonly used in photodynamic therapy (PDT) for cancer treatment?
a) Nd:YAG laser
b) CO2 laser
c) Dye laser
d) Excimer laser
Which of the following industries commonly uses laser marking?
a) Automotive
b) Textile
c) Agriculture
d) Sports
Which type of laser is used for fiber optic sensors?
a) Semiconductor laser
b) Dye laser
c) CO2 laser
d) Excimer laser
Which laser is used in laser Doppler velocimetry?
a) Nd:YAG laser
b) He-Ne laser
c) CO2 laser
d) Excimer laser
