Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q28 (CDS-I/2018) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Bright light is found to emit from photographer’s flashgun. This brightness is due to the presence of which one of the following noble gases?

Result
Your answer: —  ·  Correct: B
Explanation

The bright light emitted from a photographer’s flashgun is primarily due to the presence of Xenon gas. A flashgun, or flashtube, consists of a hermetically sealed glass tube filled with a noble gas, most commonly xenon [1]. When a high-voltage electrical current from a capacitor is discharged through the tube, the xenon gas ionizes, producing an instantaneous, high-intensity pulse of light [1]. Xenon is preferred because it produces a full-spectrum white light that closely resembles natural daylight, unlike neon which produces red light or mercury which produces bluer light. While other noble gases like argon and nitrogen are used in standard electric bulbs to prevent filament oxidation, xenon's unique atomic structure allows it to emit the intense, short-duration brightness required for photography [3].

Sources

  1. [1] https://en.wikipedia.org/wiki/Flashtube
  2. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Nitrogen > p. 272
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
100%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-I · 2017 · Q44 Relevance score: -1.70

Match List I with List II and select the coirect answer using the code given below the. Lists : List I List II (Noble gas) (Use) A. Argon 1. In lights for advertising display B. Neon 2. Airport landing lights and in C. Kwton lighthouses D. Xenon 3. Light in photographer’s flash gun 4. In tungsten filament to last longer Code : A B C D

CDS-II · 2009 · Q104 Relevance score: -4.29

The light emitted by firefly is due to

CAPF · 2020 · Q10 Relevance score: -5.41

Which one of the following gases produces a red light when electricity flows through it ?

CDS-I · 2013 · Q52 Relevance score: -5.74

Which one among the following metals is used in fireworks to make a brilliant white light ?

IAS · 2000 · Q105 Relevance score: -6.18

Assertion (A) : Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R) : Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.