Complete the account of the latent image.
The suspension medium that holds the crystals and supplies the sulfur for the sensitivity specks is ______. The mechanism by which trapped electrons attract mobile silver ions was published by Gurney and ______ in 1938. An emulsion sensitive across the whole visible spectrum is called ______. The developer reduces only those crystals that carry a developable ______.
Word bank: gelatin · Mott · panchromatic · speck · collodion · orthochromatic
Hints
- The first blank is an animal protein, and its sulfur content is not incidental.
- The last blank names the few atoms that decide a crystal's fate.
Show the answer
The suspension medium that holds the crystals and supplies the sulfur for the sensitivity specks is gelatin. The mechanism by which trapped electrons attract mobile silver ions was published by Gurney and Mott in 1938. An emulsion sensitive across the whole visible spectrum is called panchromatic. The developer reduces only those crystals that carry a developable speck.
The first blank is more than a binder. Gelatin holds the crystals apart, swells to admit the developer, and supplies the sulfur compounds that form the sensitivity specks, which is why early attempts to replace it with an inert polymer produced emulsions that were beautifully clear and hopelessly slow.
Practise The Latent Image
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More questions on The Latent Image
- A plain silver bromide emulsion is completely blind to red light, and yet modern film records red perfectly…
- The latent image is not a faint, sub-microscopic visual rendering of the scene, but a chemical distribution…
- A sensitivity speck becomes developable once it holds roughly three or four silver atoms.
- Arrange the stages of the Gurney-Mott mechanism in the order they occur.
- Sort each material by its colour sensitivity.
- Match each name to the contribution.
- Development turns a speck of a few silver atoms into a fully developed grain. By roughly what power of ten…
- Development creates the image from nothing, since the latent image contributes no silver of its own to the…