Photograph — Questions and answers
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What was the biggest challenge Joseph Nicéphore Niépce faced in his early experiments with silver chloride?
Choices
- Preventing the entire surface from turning black. ✓
- Finding enough silver chloride to use.
- Making sure an artist was nearby to help.
- Projecting an image onto the surface.
Answer: Preventing the entire surface from turning black.
From page 3
What special material did Niépce use to make his first permanent photograph?
Choices
- Bitumen of Judea ✓
- Silver chloride
- Oil of lavender
- White petroleum
Answer: Bitumen of Judea
From page 4
What important discovery did Louis Daguerre make that greatly reduced the time needed to take a picture?
Choices
- Developing a faint image with mercury vapor. ✓
- Using bitumen of Judea instead of silver chloride.
- Making images that could be copied many times.
- Exposing plates for many hours or days.
Answer: Developing a faint image with mercury vapor.
From page 5
What was a key difference between Henry Fox Talbot's 'calotype' process and Daguerre's daguerreotypes?
Choices
- Talbot's process allowed for multiple copies of an image. ✓
- Talbot's images were much sharper than Daguerre's.
- Talbot's process used silver-plated copper sheets.
- Talbot's process required longer exposure times.
Answer: Talbot's process allowed for multiple copies of an image.
From page 7