Memory and Emergence

A negative contains all the information for the final photographic print. But held up against the light, the negative often appears glaring and garish—certainly unfamiliar and sometimes difficult to recognize. Immediately after exposure in the quiet acrid environment of the darkroom, the positive enlargement is initially invisible and then starts to appear so faintly that it is scarcely detectable; only with patience as it reacts to the harsh chemical baths into which it was plunged does it emerge into a sharp, detailed, and nuanced image. In the shadows cast by the negative, as the resultant positive emerges from the nearly unrecognizable past, it is surprising and gratifying to discover a memory of the initial moment of exposure. This metaphor serves as an apt though abstract description of the experiences described in this essay.

Authors

Publication Details

Journal
Annual Review of Condensed Matter Physics
Published
2026-10-13
DOI
https://doi.org/10.1146/annurev-conmatphys-032725-093809
Primary Topic
Theoretical and Computational Physics
Type
article
Field-Weighted Citation Impact
0.00
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article

Memory and Emergence

Sidney R. Nagel
Annual Review of Condensed Matter Physics
Theoretical and Computational Physics
article

Memory and Emergence

Sidney R. Nagel
article en

Abstract

A negative contains all the information for the final photographic print. But held up against the light, the negative often appears glaring and garish—certainly unfamiliar and sometimes difficult to recognize. Immediately after exposure in the quiet acrid environment of the darkroom, the positive enlargement is initially invisible and then starts to appear so faintly that it is scarcely detectable; only with patience as it reacts to the harsh chemical baths into which it was plunged does it emerge into a sharp, detailed, and nuanced image. In the shadows cast by the negative, as the resultant positive emerges from the nearly unrecognizable past, it is surprising and gratifying to discover a memory of the initial moment of exposure. This metaphor serves as an apt though abstract description of the experiences described in this essay.

Annual Review of Condensed Matter Physics
Openalex Percentile: Top 22%
Theoretical and Computational Physics
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