World Science and Technology – 23

5555555555

23. Once the active medium is excited, the first photons of light are produced by which physical process?

(a) Blackbody radiation
(b) Spontaneous emission
(c) Synchrotron radiation
(d) Planck’s oscillation

Answer
Answer : (b)
Explanation
Explanation : Spontaneous 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.
Subject Name : General Knowledge
Exam Name : UPSC, SSC, KVS, NVS, IBPS, RBI, SBI, RRB
Posts Name : Post Graduate Teacher, College Lecturer, Officer, Office Assistant, Clerk
General Knowledge Books

IAS 2022 Total InfoCDS 2022 Total InfoSSC 2022 Total Info
RAILWAY 2022 Total InfoNDA 2022 Total InfoKVS 2022 Total Info
SBI 2022 Total InfoAFCAT 2022 Total InfoUGC NET 2022 Total Info
IBPS 2022 Total InfoJAM 2022 Total InfoCSIR UGC NET 2022 Total Info

Related Posts

  • World Science and Technology - 26555555555526. After the first photons of light are produced, which process is responsible for amplification of the light? (a) Blackbody radiation (b) Stimulated emission (c) Planck's radiation (d) Einstein oscillation
    Tags: light, radiation, science, technology, photons, produced, process, blackbody, emission, oscillation
  • World Science and Technology - 1125555555555112. In which decade was the telephone invented? (a) 1850s (b) 1860s (c) 1870s (d) 1880s
    Tags: science, technology, general, awareness
  • World Science and Technology - 1135555555555113. In which decade was the Internet first implemented? (a) 1940s (b) 1950s (c) 1960s (d) 1980s
    Tags: science, technology, general, awareness
  • World Science and Technology - 1235555555555123. How many terminals does a BJT have? (a) 1 (b) 5 (c) 4 (d) 3
    Tags: science, technology, general, awareness
  • World Science and Technology - 38555555555538. In which decade was the telegraph invented? (a) 1810s (b) 1840s (c) 1870s (d) 1890s
    Tags: science, technology, general, awareness

LEAVE A REPLY

Please enter your comment!
Please enter your name here