The invention developed in 1837 that used a copper plate coated with silver iodide is known as a ______.

heliograph

Rationale:

Heliograph used a special pewter plate placed in a camera obscura. Daguerreotype used a copper plate covered in silver iodide.

calotype

Rationale:

Calotype is a print process used in photography. Daguerreotype used a copper plate covered in silver iodide.

daguerreotype

negative

Rationale:

A negative reverses light and dark values on a reproducable photograph. Daguerreotype used a copper plate covered in silver iodide.

Answer: daguerreotype