How many photographs exist?

Answer Millions, Billions. Probally a lot of them.

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Rosalind Franklin worked on X-ray diffraction photographs of the DNA molecule what did those photographs show?

Diffraction of waves is used in crystallography to examine the arrangement of atoms in crystalline structures. X-rays are electromagnetic waves with wavelengths of a size comparable to the spacing ... Read More »

In the first practical process of reproducing photographs for books on what were photographs printed?

Pc photographs?

Why don't you have photographs?

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