Laser Trivia Quiz Questions and Answers
Laser trivia quiz questions with answers about Lasers
Laser Trivia Quiz Questions and Answers
What is a laser?
A: A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
The term "laser" originated as an acronym for what?
A: Light amplification by stimulated emission of radiation.
The first laser was built in what year?
Who built it?
A: Theodore H. Maiman at Hughes Research Laboratories.
It was based on theoretical work by whom?
A: Charles Hard Townes and Arthur Leonard Schawlow.
A laser differs from other sources of light in that it emits light how?
A: Coherently, spatially and temporally.
Lasers are characterized according to what?
A: Their wavelength in a vacuum.
Most "single wavelength" lasers actually produce radiation in several modes having slightly differing what?
A: Frequencies (wavelengths), often not in a single polarization.
Although temporal coherence implies monochromaticity, there are lasers that emit what?
A: A broad spectrum of light or emit different wavelengths of light simultaneously.
In the early technical literature
, especially at Bell Telephone Laboratories, the laser was called what?
A: An optical maser.
A laser that produces light by itself is technically a what?
A: An optical oscillator rather than an optical amplifier as suggested by the acronym.
The back-formed verb to lase is frequently used in the field, meaning what?
A: To produce laser light.
When a laser is operating it is said to be what?
The most common type of laser uses feedback from a what?
A: An optical cavity—a pair of mirrors on either end of laser.
Typically one of the two mirrors is what?
A: Partially transparent.
Some of the light does what through this mirror?
Depending on the design of the cavity the light coming out of the laser may do what?
A: Spread out or form a narrow beam.
Most practical lasers contain additional elements that affect properties of the emitted light, such as what?
A: The polarization, wavelength, and shape of the beam.
When lasers were invented
in 1960, they were called what?
A: A solution looking for a problem.
Since then, they have become what?
The first use of lasers in the daily lives of the general population was what?
A: The supermarket barcode scanner, introduced in 1974.
The laserdisc player, introduced in 1978, was the first successful consumer product to include what?
A: A laser.
Lasers are used to treat cancer by doing what?
A: Shrinking or destroying tumors or precancerous growths.
They are most commonly used to treat what kind of cancers?
A: Superficial cancers that are on the surface of the body or the lining of internal organs.
Lasers are more precise than traditional what?
A: Surgery methods and cause less damage, pain, bleeding, swelling, and scarring.
A disadvantage is that surgeons must have what?
A: Specialized training.
Lasers of even a fraction of a watt in power can produce immediate, permanent what?
A: Vision loss.
Incidents of pilots being exposed to lasers while flying have prompted aviation authorities to do what?
A: Implement special procedures to deal with such hazards.
Laser weapons capable of directly damaging or destroying a target in combat are what?
A: Still in the experimental stage.
The general idea of laser-beam weaponry is to what?
A: Hit a target with a train of brief pulses of light.
The rapid evaporation and expansion of the surface causes what?
A: Shockwaves that damage the target.
The power needed to project a high-powered laser beam of this kind is what?
A: Beyond the limit of current mobile power technology
Throughout the 2000s, the United States Air Force worked on the Boeing YAL-1, which was a what?
A: An airborne laser mounted in a Boeing 747.
It was intended to be used to do what?
A: To shoot down incoming ballistic missiles over enemy territory.
In March 2009, Northrop Grumman claimed that its engineers had successfully built and tested a solid state laser capable of producing a 100-kilowatt beam, powerful enough to do what?
A: To destroy an airplane.
Ultimately, the project was deemed to be what?
In recent years, who has taken an interest in lasers?
Lasers used by hobbyists are generally of what class?
A: Class IIIa or IIIb.
Even the first laser was recognized as being what?
A: Potentially dangerous.
Theodore Maiman characterized the first laser as having a power of what?
A: One "Gillette" as it could burn through one Gillette razor blade.