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Images with coins to indicate scale

Common coin diameters for reference:

  • U.S. dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.21 mm, 0.84 in
    • 10¢: 17.91 mm, 0.71 in
    • 25¢: 24.26 mm, 0.94 in
    • 50¢: 30.61 mm, 1.22 in
    • $1: 26.5 mm, 1.02 in
  • Canadian dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.2 mm, 0.83 in
    • 10¢: 18.03 mm, 0.71 in
    • 25¢: 23.88 mm, 0.94 in
    • 50¢: 27.13 mm, 1.07 in
    • $1: 26.5 mm, 1.02 in
    • $2: 28 mm, 1.1 in
  • Pound sterling as of 2021:
    • 1p: 20.32 mm, 0.8 in
    • 2p: 25.91 mm, 1.02 in
    • 5p: 18 mm, 0.71 in
    • 10p: 24.5 mm, 0.96 in
    • 20p: 21.4 mm, 0.84 in
    • 50p: 27.3 mm, 1.07 in
    • £1: 23.03–23.43 mm, 0.91–0.92 in
    • £2: 28.4 mm, 1.12 in
  • Euro as of 2002:
    • 1c: 16.25 mm, 0.64 in
    • 2c: 18.75 mm, 0.74 in
    • 5c: 21.25 mm, 0.84 in
    • 10c: 19.75 mm, 0.78 in
    • 20c: 22.25 mm, 0.88 in
    • 50c: 24.25 mm, 0.95 in
    • €1: 23.25 mm, 0.92 in
    • €2: 25.75 mm, 1.01 in

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Summary

Description
English: The first three from the top are xenon flashtubes. The bottom one is a krypton arc lamp, which has a smaller diameter, higher pressure, thinner glass (for better cooling), and a cathode with a sharp tip. The anodes are on the right hand side, and the cathodes are on the left. The second flashtube is designed for water cooling, and portions of the glass can be seen that have been shrunken around the electrodes (also for cooling). This flashtube shows signs of sputter around its cathode, appearing as dark deposits of metal on the glass. A penny is shown for size.
Date (UTC)
Source Own work
Author Zaereth (talk)

Licensing

Public domain This work has been released into the public domain by its author, Zaereth. This applies worldwide.

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Zaereth grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

Transferred from en.wikipedia to Commons using For the Common Good.

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
18:03, 14 September 2009 2,832 × 1,458 (984,366 bytes) w:en:Zaereth (talk | contribs) ({{Information |Description = The first three from the top are xenon flashtubes. The bottom one is a krypton arc lamp, which has a smaller diameter and a cathode with a sharp tip. The anodes are on the right hand side, and the second flashtube shows si)

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released into the public domain by the copyright holder

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Canon PowerShot A470

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14 September 2009

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current12:04, 3 May 2013Thumbnail for version as of 12:04, 3 May 20132,832 × 1,458 (961 KB)Vahram MekhitarianTransferred from en.wikipedia: see original upload log above
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source: http://en.wikipedia.org/wiki/File:Three_xenon_flashtubes_and_a_krypton_arc_lamp.jpg