- 1. Laser physics is a branch of physics that studies the properties and behavior of lasers. Lasers are devices that emit coherent light through a process called stimulated emission. They have found numerous applications in various fields such as communication, medicine, industry, and scientific research. Laser physics involves the study of the principles behind laser operation, including the interaction of light with matter, optical resonators, gain media, and beam characteristics. Researchers in laser physics work to develop new laser systems with improved performance and explore innovative applications for these versatile light sources.
What does LASER stand for?
A) Light Amplification by Stimulated Emission of Radiation
B) Light Absorption through Selective Emission of Radiation
C) Luminous Amplification through Simple Emission of Rays
D) Laser Amplification using Stimulated Energy Reactions
- 2. Who is credited with inventing the first working laser?
A) Theodore Maiman
B) Nikola Tesla
C) Albert Einstein
D) Isaac Newton
- 3. Which process contributes to laser amplification?
A) Diffraction
B) Stimulated emission
C) Reflection
D) Absorption
- 4. In a laser cavity, what component reflects light back and forth to amplify it?
A) Filters
B) Lenses
C) Prisms
D) Mirrors
- 5. What is the name of the process where light waves align in phase?
A) Polarization
B) Refraction
C) Coherence
D) Scattering
- 6. Which property of laser light allows it to be focused to a small spot size?
A) Polarization
B) Divergence
C) Temporal coherence
D) Spatial coherence
- 7. Which laser type produces the shortest pulses?
A) Femtosecond
B) Continuous wave
C) Nanosecond
D) Picosecond
- 8. Which laser parameter determines the color of laser light?
A) Power
B) Coherence
C) Divergence
D) Wavelength
- 9. Which laser type is commonly used in barcode scanners?
A) Ruby
B) Helium-neon
C) Excimer
D) Diode
- 10. What is the approximate speed of light in a vacuum?
A) 299,792 kilometers per second
B) 1,000,000 kilometers per second
C) 100,000 kilometers per second
D) 500,000 kilometers per second
- 11. What type of laser is commonly used in eye surgery?
A) Fiber laser
B) Excimer laser
C) Gas laser
D) Dye laser
- 12. What is the typical output of a laser measured in?
A) Volts
B) Watts
C) Hertz
D) Amperes
- 13. Which phenomenon allows a laser beam to stay focused over long distances?
A) Scattering
B) Diffraction
C) Dispersion
D) Reflection
- 14. What is the process of pulsed laser operation called?
A) Mode-locking
B) Pump-probe
C) Q-switching
D) Chirped-pulse amplification
- 15. What is the term for the spreading out of a laser beam as it propagates?
A) Refraction
B) Convergence
C) Diffusion
D) Divergence
- 16. In which year was the first working laser demonstrated?
A) 1950
B) 1970
C) 1980
D) 1960
- 17. Which type of laser is often used for cutting and engraving materials?
A) Fiber laser
B) Semiconductor laser
C) CO2 laser
D) Dye laser
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