Passage 1: The Invention of Photography
ALong before a photograph could be fixed permanently onto a surface, artists and scientists had experimented for centuries with the camera obscura, a darkened box or room in which light passing through a small hole projects an inverted image of the outside world onto an opposite wall. Painters used the device as a drawing aid, tracing the projected image by hand, but the image itself vanished the moment the light source was blocked. The missing piece was a way to make that fleeting projection permanent, and it was this problem that occupied a small number of European experimenters in the early nineteenth century, working largely in isolation from one another and unaware how close their rivals had come to a solution. Chemists across several countries had noticed that certain silver compounds darkened on exposure to light, but turning that curiosity into a controllable image proved a far harder engineering problem than merely observing the effect.
BThe earliest surviving permanent photographic image is generally credited to the French inventor Joseph Nicéphore Niépce, who in 1826 or 1827 produced a view from an upstairs window of his family estate at Le Gras using a pewter plate coated with a light-sensitive form of bitumen. The exposure required roughly eight hours of daylight, during which the sun moved across the sky and left shadows falling in two directions on the finished image, a peculiarity that puzzled early viewers unfamiliar with the process. Niépce called his technique heliography, literally "sun-writing," and though the resulting image was faint and coarse, it demonstrated for the first time that light itself could be made to draw a lasting picture without a human hand. News of the achievement spread slowly at first, since Niépce kept many technical details to himself while he sought a business partner willing to fund further refinement of the process.
CIn 1829, Niépce entered into partnership with Louis Daguerre, a Parisian painter and showman already known for his theatrical dioramas, in the hope of refining heliography into something more practical. When Niépce died in 1833, Daguerre continued the research alone and, by 1837, had developed a markedly faster and sharper process using a silver-plated sheet of copper sensitised with iodine vapour, exposed in a camera, and then developed using mercury vapour. The French government, recognising the invention's significance, purchased the rights from Daguerre and announced in 1839 that the process, which came to be known as the daguerreotype, would be given "free to the world," a gesture widely reported at the time as an act of national generosity rather than a purely commercial decision. In practice, the arrangement guaranteed Daguerre and Niépce's son a modest annual pension from the French state, a compromise that satisfied neither party's hopes of far greater personal reward.
DAcross the English Channel, the scientist William Henry Fox Talbot had been pursuing a parallel but distinct approach. Rather than fixing a single image onto a metal plate, Talbot's calotype process, patented in 1841, produced a paper negative from which any number of positive prints could subsequently be made, establishing the negative-positive principle that would dominate photography for the following century and a half. The calotype's soft, slightly textured image never matched the crisp detail of a daguerreotype, and Talbot's insistence on licensing fees for its use discouraged many photographers from adopting it, but its reproducibility gave it an advantage the daguerreotype could never overcome: a single calotype negative could furnish an unlimited supply of identical copies. Talbot published his method in a series of privately printed volumes illustrated with actual photographic prints pasted onto the page, among the earliest books ever to be illustrated this way.
EThrough the 1840s and into the 1850s, it was nevertheless the daguerreotype, not the calotype, that captured the public imagination, particularly in portrait studios that sprang up in cities across Europe and North America. Early exposure times of several minutes, which had forced sitters to remain rigidly still, sometimes with the aid of a hidden neck brace, were gradually reduced to a matter of seconds as lens design improved, making portraiture more comfortable and commercially viable. A daguerreotype portrait, often hand-tinted with delicate colour and mounted in a small hinged case, became a prized possession for families who had never before been able to afford a painted likeness, and studios competed fiercely on price, speed and the perceived flattery of their finished plates. Studio proprietors advertised aggressively in local newspapers, promising sittings of only a few seconds and touting elaborate backdrops meant to rival the settings found in an oil portrait.
FThe daguerreotype's dominance ended abruptly with the introduction, in 1851, of the wet collodion process, devised by the English sculptor and photographer Frederick Scott Archer. By coating a glass plate with a sticky collodion solution before exposing and developing it while still wet, Archer's method combined the sharpness of the daguerreotype with the reproducibility of the calotype, and did so at a fraction of the cost of either. Archer never patented the process, allowing it to spread rapidly among professional and amateur photographers alike, and within a decade the daguerreotype had all but disappeared from commercial use. The single lasting drawback of the wet collodion process, that the plate had to be prepared, exposed and developed before the collodion dried, meant that photographers working outdoors required a portable darkroom, a limitation that would not be overcome until dry photographic plates became widely available later in the century. Even so, the wet collodion era is now remembered as the point at which photography shifted from a costly novelty into a genuinely mass medium.
- bitumen:
- a black, tar-like substance used in Niépce's early light-sensitive coating
- collodion:
- a syrupy solution of nitrocellulose used to coat glass photographic plates
أسئلة النص 1
Do the following statements agree with the information given in Reading Passage 1? Write TRUE if the statement agrees with the information, FALSE if the statement contradicts the information, NOT GIVEN if there is no information on this.
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1The camera obscura could produce an image that remained visible after the light source was removed.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'Painters used the device as a drawing aid, tracing the projected image by hand, but the image itself vanished the moment the light source was blocked' (Paragraph A)"
ليش صحيح: النص ينص صراحة على أن الصورة كانت تختفي فور إزالة مصدر الضوء.. عكس ما تدّعيه العبارة.
ليش الباقي خطأ: ليست TRUE بسبب التناقض المباشر؛ وليست NOT GIVEN لأن النص يذكر بوضوح أن الصورة كانت تختفي.
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2The photographic plate that Niépce produced at Le Gras in 1826 or 1827 is now displayed in a public museum.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
NOT GIVEN
"لا يوجد أي ذكر في النص لمكان حفظ اللوح حاليًا أو عرضه في متحف (Paragraph B تصف فقط إنتاج اللوح ومدة التعريض)"
ليش صحيح: النص يتوقف عند وصف الإنتاج ومدة التعريض ولا يذكر مصير اللوح لاحقًا.
ليش الباقي خطأ: ليست TRUE لأن النص لا يؤكد هذه المعلومة؛ وليست FALSE لأنه لا ينفيها أيضًا.. المعلومة غائبة تمامًا.
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3Daguerre and Niépce began working together before Niépce's death in 1833.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
TRUE
"'In 1829, Niépce entered into partnership with Louis Daguerre... When Niépce died in 1833' (Paragraph C)"
ليش صحيح: الشراكة بدأت عام 1829، قبل وفاة نيبس عام 1833.
ليش الباقي خطأ: ليست FALSE لعدم وجود تناقض في الترتيب الزمني؛ وليست NOT GIVEN لأن كلا التاريخين مذكوران بوضوح.
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4The French government paid Daguerre a large personal fortune in exchange for exclusive private use of the daguerreotype.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'would be given "free to the world"' and 'the arrangement guaranteed Daguerre and Niépce's son a modest annual pension from the French state, a compromise that satisfied neither party's hopes of far greater personal reward' (Paragraph C)"
ليش صحيح: النص يناقض كلا شقّي العبارة: العملية أُعلنت مجانية للعالم لا حصرية، والمقابل كان معاشًا متواضعًا لا ثروة كبيرة.
ليش الباقي خطأ: ليست TRUE لأن كلا الشقّين يناقضهما النص مباشرة؛ وليست NOT GIVEN لأن النص يقدّم معلومات مضادة صريحة.
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5Talbot's calotype process allowed multiple prints to be made from a single negative.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
TRUE
"'produced a paper negative from which any number of positive prints could subsequently be made' (Paragraph D)"
ليش صحيح: إعادة صياغة مباشرة.. عدد غير محدود من النسخ من سلبية واحدة.
ليش الباقي خطأ: ليست FALSE لعدم وجود تناقض؛ وليست NOT GIVEN لأن الحقيقة مذكورة صراحة.
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6Frederick Scott Archer patented the wet collodion process shortly after inventing it in 1851.
TRUE / FALSE / NOT GIVEN
اعرض الإجابة
FALSE
"'Archer never patented the process, allowing it to spread rapidly' (Paragraph F)"
ليش صحيح: النص ينص صراحة على أنه لم يسجل براءة اختراع أبدًا.. تناقض مباشر.
ليش الباقي خطأ: ليست TRUE بسبب التناقض الصريح؛ وليست NOT GIVEN لأن النص واضح تمامًا.
Complete the notes below. Choose ONE WORD ONLY from the passage for each answer.
Camera obscura: used by painters as a (7) ________ aid, but the projected image could not be kept
1826/27: Niépce's heliography, exposure took about eight hours, on a (8) ________ plate
1839: Daguerre's process announced by the French government as "free to the (9) ________"
1841: Talbot patents the calotype, producing a (10) ________ from which many prints could be made
1840s-50s: daguerreotype portraits often hand-(11) ________ and mounted in small hinged cases
1851: Archer's wet collodion process combines sharpness with reproducibility, at lower (12) ________
Limitation of wet collodion: the plate had to stay wet throughout exposure, requiring a portable (13) ________
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7Question 7
اعرض الإجابة
drawing
"'Painters used the device as a drawing aid' (Paragraph A)"
ليش صحيح: الكلمة مأخوذة حرفيًا من النص.
ليش الباقي خطأ: أي كلمة أخرى لا تطابق الصياغة الحرفية المطلوبة.
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8Question 8
اعرض الإجابة
pewter
"'using a pewter plate coated with a light-sensitive form of bitumen' (Paragraph B)"
ليش صحيح: الكلمة الدقيقة لنوع المعدن المستخدم.
ليش الباقي خطأ: كلمات أخرى مثل "metal" أقل دقة من الكلمة الحرفية المطلوبة.
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9Question 9
اعرض الإجابة
world
"'would be given "free to the world"' (Paragraph C)"
ليش صحيح: الكلمة الدقيقة المقتبسة حرفيًا.
ليش الباقي خطأ: أي كلمة أخرى غير مذكورة في هذا الاقتباس.
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10Question 10
اعرض الإجابة
negative
"'produced a paper negative from which any number of positive prints could subsequently be made' (Paragraph D)"
ليش صحيح: الكلمة الدقيقة التي تصف ما أنتجته عملية الكالوتايب.
ليش الباقي خطأ: كلمة "print" تصف النتيجة النهائية لا المنتج الأساسي.
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11Question 11
اعرض الإجابة
tinted
"'often hand-tinted with delicate colour and mounted in small hinged cases' (Paragraph E)"
ليش صحيح: الكلمة الدقيقة المستخدمة لإضافة اللون يدويًا.
ليش الباقي خطأ: كلمات أخرى مثل "painted" غير مستخدمة حرفيًا في هذا الموضع.
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12Question 12
اعرض الإجابة
cost
"'did so at a fraction of the cost of either' (Paragraph F)"
ليش صحيح: الكلمة الدقيقة التي وصفت الميزة الاقتصادية.
ليش الباقي خطأ: كلمات أخرى مثل "price" غير مستخدمة حرفيًا في هذا الموضع.
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13Question 13
اعرض الإجابة
darkroom
"'photographers working outdoors required a portable darkroom' (Paragraph F)"
ليش صحيح: الكلمة الدقيقة للمرفق المحمول المطلوب.
ليش الباقي خطأ: كلمات أخرى مثل "tent" غير مذكورة لهذا الغرض.