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- Question
The first step to getting output from a laser is to excite an active medium. What is this process called?
Options- A. Pumping
- B. Exciting
- C. Priming
- D. Raising
- Correct Answer
- Pumping
ExplanationA collection of atoms or molecules that can be excited to a higher energy state is called an active medium. Before lasing can occur, the active media is "pumped". The process of raising the atoms in the active media from a lower energy state to a higher state is like pumping water up from a well. - 1. '.JPG' extension refers usually to what kind of file?
Options- A. System file
- B. Animation/movie file
- C. MS Encarta document
- D. Image file Discuss
- 2. The average power (in watts) used by a 20 to 25 inch home color television is...?
Options- A. 70-100
- B. 25-50
- C. 500-800
- D. Over 1000 Discuss
- 3. What was the active medium used in the first working laser ever constructed?
Options- A. A diamond block
- B. Helium-neon gas
- C. A ruby rod
- D. Carbon dioxide gas Discuss
- 4. In what year was the "@" chosen for its use in e-mail addresses?
Options- A. 1976
- B. 1972
- C. 1980
- D. 1984 Discuss
- 5. 'CD' computer abbreviation usually means?
Options- A. Command Description
- B. Change Data
- C. Copy Density
- D. Compact Disc Discuss
- 6. Who co-founded Hotmail in 1996 and then sold the company to Microsoft?
Options- A. Shawn Fanning
- B. Ada Byron Lovelace
- C. Sabeer Bhatia
- D. Ray Tomlinson Discuss
- 7. In which decade was the SPICE simulator introduced?
Options- A. 1950s
- B. 1960s
- C. 1970s
- D. 1980s Discuss
- 8. '.MOV' extension refers usually to what kind of file?
Options- A. Image file
- B. Animation/movie file
- C. Audio file
- D. MS Office document Discuss
- 9. What frequency range is the High Frequency band?
Options- A. 100 kHz
- B. 1 GHz
- C. 30 to 300 MHz
- D. 3 to 30 MHz Discuss
- 10. What do we call a network whose elements may be separated by some distance? It usually involves two or more small networks and dedicated high-speed telephone lines.
Options- A. URL (Universal Resource Locator)
- B. LAN (Local Area Network)
- C. WAN (Wide Area Network)
- D. World Wide Web Discuss
Technology problems
Search Results
Correct Answer: Image file
Correct Answer: 70-100
Explanation:
About the same as as the most popular light bulb size.
Correct Answer: A ruby rod
Explanation:
Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.
Correct Answer: 1972
Correct Answer: Compact Disc
Correct Answer: Sabeer Bhatia
Correct Answer: 1970s
Explanation:
SPICE (Simulation Program with Integrated Circuit Emphasis) was introduced in May 1972 by the University of Berkeley, California.
Correct Answer: Animation/movie file
Correct Answer: 3 to 30 MHz
Explanation:
The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.
Correct Answer: WAN (Wide Area Network)
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