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- Question
Once the active medium is excited, the first photons of light are produced by which physical process?
Options- A. Blackbody radiation
- B. Spontaneous emission
- C. Synchrotron radiation
- D. Planck?s oscillation
- Correct Answer
- Spontaneous emission
ExplanationSpontaneous emission is what you see with most "glow in the dark" toys. You excite the toy by exposing it to bright light, then the toy glows in the dark by spontaneously emitting photons as the excited atoms relax back down to their normal state. - 1. Shanthi Swaroop Bhatnagar awards are given for
Options- A. exploring new dimensions in creative writing in Indian languages
- B. outstanding contribution to science
- C. creating mass awareness on environmental issues
- D. excellence in film direction Discuss
- 2. Which UN body deals with population problem?
Options- A. UNFPA
- B. UNDP
- C. UNICEF
- D. UNESCO Discuss
- 3. Made from a variety of materials, such as carbon, which inhibits the flow of current...?
Options- A. Choke
- B. Inductor
- C. Resistor
- D. Capacitor Discuss
- 4. Sun Temple is situated at?
Options- A. Konark
- B. Bangalore
- C. Haridwar
- D. Kerala Discuss
- 5. Who said the words, 'I disapprove of what you say, but I will defend to Death your right to say it'?
Options- A. George Bernard Shaw
- B. Lenin
- C. Voltaire
- D. Mahatma Gandhi Discuss
- 6. How many bits is a byte?
Options- A. 4
- B. 8
- C. 16
- D. 32 Discuss
- 7. ARPANET, the precursor to the Internet, was developed by:
Options- A. FAA
- B. Department of Defence
- C. NATO
- D. UART Discuss
- 8. One fathom is equal to
Options- A. 6 feet
- B. 6 meters
- C. 60 feet
- D. 100 cm Discuss
- 9. The shape of earth is
Options- A. sphere
- B. oblate spheroid
- C. circular
- D. spheroid Discuss
- 10. The study of soils is called
Options- A. geomorphology
- B. pedology
- C. hydrology
- D. biogeography Discuss
More questions
Correct Answer: outstanding contribution to science
Correct Answer: UNFPA
Explanation:
UNFPA = United Nations Fund for Population Activities.
Correct Answer: Resistor
Explanation:
So named because it resists (or inhibits) the flow of current.
Correct Answer: Konark
Correct Answer: Voltaire
Correct Answer: 8
Correct Answer: Department of Defence
Correct Answer: 6 feet
Correct Answer: oblate spheroid
Correct Answer: pedology
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