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- Question
After the first photons of light are produced, which process is responsible for amplification of the light?
Options- A. Blackbody radiation
- B. Stimulated emission
- C. Planck's radiation
- D. Einstein oscillation
- Correct Answer
- Stimulated emission
ExplanationThe word "laser" is actually an acronym for light amplification by stimulated emission of radiation. Atoms or molecules of the active medium that have been excited to a higher energy level are stimulated by a passing photon to relax to a lower energy level and emit a photon that is indistinguishable from the passing photon, thereby increasing the number of photons like the incident one. - 1. '.INI' extension refers usually to what kind of file?
Options- A. Image file
- B. System file
- C. Hypertext related file
- D. Image Color Matching Profile file Discuss
- 2. In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about...?
Options- A. 500 volts
- B. 5 thousand volts
- C. 25 thousand volts
- D. 100 thousand volts Discuss
- 3. Where is the headquarters of Intel located?
Options- A. Redmond, Washington
- B. Tucson, Arizona
- C. Santa Clara, California
- D. Richmond, Virginia Discuss
- 4. In the United States the television broadcast standard is...?
Options- A. PAL
- B. NTSC
- C. SECAM
- D. RGB Discuss
- 5. In which decade was the ARRL founded?
Options- A. 1940s
- B. 1930s
- C. 1920s
- D. 1910s Discuss
- 6. In which decade was the American Institute of Electrical Engineers (AIEE) founded?
Options- A. 1850s
- B. 1880s
- C. 1930s
- D. 1950s Discuss
- 7. The electromagnetic coils on the neck of the picture tube or tubes which pull the electron beam from side to side and up and down are called a...?
Options- A. Transformer
- B. Yoke
- C. Capacitor
- D. Diode Discuss
- 8. In which year was MIDI(Musical Instrument Digital Interface) introduced?
Options- A. 1987
- B. 1983
- C. 1973
- D. 1977 Discuss
- 9. Most modern TV's draw power even if turned off. The circuit the power is used in does what function?
Options- A. Sound
- B. Remote control
- C. Color balance
- D. High voltage Discuss
- 10. Who is largely responsible for breaking the German Enigma codes, created a test that provided a foundation for artificial intelligence?
Options- A. Alan Turing
- B. Jeff Bezos
- C. George Boole
- D. Charles Babbage Discuss
Technology problems
Search Results
Correct Answer: System file
Correct Answer: 25 thousand volts
Explanation:
This voltage often remains in storage even if the set is unplugged. Although the voltage is very high it has very low power but it can be dangerous because your body jumps if brought in contact.
Correct Answer: Santa Clara, California
Correct Answer: NTSC
Explanation:
PAL and SECAM are standards used in other countries. RGB stands for red, green, and blue - the colors of light used to create an image in a color tv set and is often used as a format name for computer monitors.
Correct Answer: 1910s
Explanation:
On April 6, 1914, Hiram Percy Maxim proposed the formation of the American Radio Relay League.
Correct Answer: 1880s
Explanation:
The IEEE (Institute of Electrical and Electronics Engineers) was formed in 1963 by the merger of the Institute of Radio Engineers (IRE, founded 1912) and the American Institute of Electrical Engineers (AIEE, founded 1884).
Correct Answer: Yoke
Explanation:
Twisting the yoke will tilt the picture. A projection color television uses three picture tubes and yokes for red, green and blue light.
Correct Answer: 1983
Correct Answer: Remote control
Explanation:
Some authorities are recommending TV's, VCR's and Stereo's be connected to power strips with switches and turned off when not in use to save energy. Your remote will not work until power is switched back on.
Correct Answer: Alan Turing
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