Photograph | Britannica

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In order to understand them, one must first understand the characteristics of the process itself. One of the most important characteristics is immediacy. Usually, but not necessarily, the image that is recorded is formed by a lens in a camera.…</p><a class="read-more" href="/technology/photography#ref416318">Read More</a></li></ul></section><section><h3>collection by libraries</h3><ul class="list-unstyled"><li><div class="md-assembly-wrapper card-media" data-type="image"><img src="https://cdn.britannica.com/98/2098-050-94B148D6/Reading-Room-collaboration-British-Museum-Sidney-Smirke-1857.jpg?w=300" alt="British Museum: Reading Room" data-width="1062" data-height="1176" loading="lazy"></div> <span class="index-xref">In <a href="https://www.britannica.com/topic/library/Library-materials#ref320730" class="md-crosslink " data-show-preview="true">library: Photographs</a></span><p class="topic-paragraph"> The invention of photography in the 19th century made possible a new kind of record, and collections of photographs are popular, particularly in public libraries with an interest in local history. Specialized photo libraries, such as the BBC Hulton Picture Library, are regularly used… </p><a class="read-more" href="/topic/library/Library-materials#ref320730">Read More</a></li></ul></section><section><h3>facsimile transmission</h3><ul class="list-unstyled"><li><div class="md-assembly-wrapper card-media" data-type="image"><img src="https://cdn.britannica.com/38/115138-050-AD663254/Fax-machines-information-telephone-line.jpg?w=300" alt="Fax machines send and receive information using a telephone line." data-width="1067" data-height="1600" loading="lazy"></div> <span class="index-xref">In <a href="https://www.britannica.com/technology/fax#ref1089409" class="md-crosslink " data-show-preview="true">fax: Early telegraph facsimile</a></span><p class="topic-paragraph">…optical scanning and transmission of photographs was demonstrated by Arthur Korn of Germany in 1902. Korn’s transmitter employed a selenium photocell to sense an image wrapped on a transparent glass cylinder; at the receiver the transmitted image was recorded on photographic film. By 1906 Korn’s equipment was put into regular…</p><a class="read-more" href="/technology/fax#ref1089409">Read More</a></li></ul></section></section></div> </div> </div> </div> <aside class="col-md-da-320" data-page="1"></aside> </div> </div> </div> </div> </article></div> </div></div> </div> </main> <div id="md-footer"></div> <noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-5W6NC8" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <script type="text/javascript" id="_informizely_script_tag"> var IzWidget = IzWidget || {}; (function (d) { var scriptElement = d.createElement('script'); scriptElement.type = 'text/javascript'; scriptElement.async = true; scriptElement.src = "https://insitez.blob.core.windows.net/site/f780f33e-a610-4ac2-af81-3eb184037547.js"; var node = d.getElementById('_informizely_script_tag'); node.parentNode.insertBefore(scriptElement, node); } )(document); </script>  <script> window.ap3c = window.ap3c || {}; var ap3c = window.ap3c; ap3c.cmd = ap3c.cmd || []; ap3c.cmd.push(function() { ap3c.init('ZO4siT4cLwnykPnzZWJtd3Byb2Q', 'https://engage.email.britannica.com/'); ap3c.track({v: 0}); }); ap3c.activity = function(act) { ap3c.act = (ap3c.act || []); ap3c.act.push(act); }; var s, t; s = document.createElement('script'); s.type = 'text/javascript'; s.src = "https://engage.email.britannica.com/app.js"; t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(s, t); </script> <script class="marketing-page-info" type="application/json"> {"pageType":"Topic","templateName":"INDEX","pageNumber":1,"pagesTotal":1,"pageId":457899,"pageLength":0,"initialLoad":true,"lastPageOfScroll":false} </script> <script class="marketing-content-info" type="application/json"> [] </script> <script src="https://cdn.britannica.com/mendel-resources/3-131/js/libs/jquery-3.5.0.min.js?v=3.131.7"></script> <script type="text/javascript" data-type="Init Mendel Code Splitting"> (function() { $.ajax({ dataType: 'script', cache: true, url: 'https://cdn.britannica.com/mendel-resources/3-131/dist/topic-page.js?v=3.131.7' }); })(); </script> <script class="analytics-metadata" type="application/json"> {"leg":"B","adLeg":"B","userType":"ANONYMOUS","pageType":"Topic","pageSubtype":null,"articleTemplateType":"INDEX","gisted":false,"pageNumber":1,"hasSummarizeButton":false,"hasAskButton":false} </script> <script type="text/javascript"> EBStat={accountId:-1,hostnameOverride:'webstats.eb.com',domain:'www.britannica.com', json:''}; </script> <script type="text/javascript"> ( function() { $.ajax( { dataType: 'script', cache: true, url: '//www.britannica.com/webstats/mendelstats.js?v=1' } ) .done( function() { try {writeStat(null,EBStat);} catch(err){} } ); })(); </script> <div id="bc-fixed-dialogue"></div> </body> </html>

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