https://www.iala.int/wiki/dictionary/index.php?action=history&feed=atom&title=Blondel-Rey_Law Blondel-Rey Law - Revision history 2026-05-11T18:17:14Z Revision history for this page on the wiki MediaWiki 1.41.5 https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=8981&oldid=prev Minsuids at 19:28, 2 February 2024 2024-02-02T19:28:09Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:28, 2 February 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l2">Line 2:</td> <td colspan="2" class="diff-lineno">Line 2:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&#039;&#039;&#039;2-1-405</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&#039;&#039;&#039;2-1-405</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>An empirical law relating the effective intensity (Ie) of a rhythmic light having a quasi-rectangular intensity-time distribution, to the intensity (Io) which the same light would appear to exhibit if fixed, and to the duration (t) of the light flash. The relation was established by subjective observation <del style="font-weight: bold; text-decoration: none;">for </del>lights observed at the threshold of illuminance, in the form</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>An empirical law relating the effective intensity (Ie) of a rhythmic light having a quasi-rectangular intensity-time distribution, to the intensity (Io) which the same light would appear to exhibit if fixed, and to the duration (t) of the light flash. The relation was established by subjective observation <ins style="font-weight: bold; text-decoration: none;">of </ins>lights observed at the threshold of illuminance, in the form</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>(Equation)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>(Equation)</div></td></tr> <tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">Line 17:</td> <td colspan="2" class="diff-lineno">Line 17:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:IALA Dictionary 1970-89 Edition]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:IALA Dictionary 1970-89 Edition]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Needs Editing]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Needs Editing]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:IALA Dictionary 2023 Revision]]</ins></div></td></tr> </table> Minsuids https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=7850&oldid=prev Oferiks at 10:53, 19 May 2012 2012-05-19T10:53:54Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 10:53, 19 May 2012</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l16">Line 16:</td> <td colspan="2" class="diff-lineno">Line 16:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Alphabetical Index]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; 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text-decoration: none;">[[Category:Needs Editing]]</ins></div></td></tr> </table> Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=6411&oldid=prev Oferiks: 1 revision 2009-03-01T10:00:32Z <p>1 revision</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <tr class="diff-title" lang="en"> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 10:00, 1 March 2009</td> </tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr></table> Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=6410&oldid=prev Oferiks: 1 revision 2009-02-25T10:00:11Z <p>1 revision</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <tr class="diff-title" lang="en"> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 10:00, 25 February 2009</td> </tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr></table> Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=1572&oldid=prev Oferiks: 1 revision 2009-02-25T00:00:11Z <p>1 revision</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <tr class="diff-title" lang="en"> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 00:00, 25 February 2009</td> </tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr></table> Oferiks https://www.iala.int/wiki/dictionary/index.php?title=Blondel-Rey_Law&diff=1571&oldid=prev Oferiks at 12:00, 15 February 2009 2009-02-15T12:00:00Z <p></p> <p><b>New page</b></p><div><br /> &#039;&#039;&#039;2-1-405<br /> <br /> An empirical law relating the effective intensity (Ie) of a rhythmic light having a quasi-rectangular intensity-time distribution, to the intensity (Io) which the same light would appear to exhibit if fixed, and to the duration (t) of the light flash. The relation was established by subjective observation for lights observed at the threshold of illuminance, in the form<br /> <br /> (Equation)<br /> <br /> where &#039;a&#039; has an empirically determined value.<br /> <br /> The law has also in practice been applied in conditions differing widely from those applicable to the determinations of Blondel and Rey. The value for &#039;a&#039; then depends upon the colour and shape of the light impulse, the angle subtended by the light at the observer and the luminance of the background against which the light must be seen. Thus the values of &#039;a&#039; may vary within a wide range. For various countries, values of &#039;a&#039; ranging between 0.1 and 0.3 second have been used.<br /> <br /> {{IALAFooter}}<br /> <br /> {{languages|Blondel-Rey Law}}<br /> [[Category:2.1 Optics and Vision]]<br /> [[Category:Alphabetical Index]]<br /> [[Category:IALA Dictionary 1970-89 Edition]]</div> Oferiks