Negative film was invented by which allowed negative images to be produced. a negative image is a a. (1) ansel adams; (2) photographic print in white on a blue ground, often used for copying maps, or architects plans. b. (1) henry fox talbot; (2) tonal inversion of a positive image, where light appears dark, and dark appears light. c. (1) keith cottingham; (2) photographic print in white on a blue ground, often used for copying maps, or architects plans. d. (1) louis daguerre; (2) tonal inversion of a positive image, where light appears dark, and dark appears light.

Option B,

(1) Henry Fox Talbot

(2) tonal inversion of a positive image, where light appears dark, and dark appears light.

Explanation:

It was William Henry Fox Talbot who first developed the negative film on a paper through negative-positive processes in 1850s. Negative films on paper later paved way for negative films on glass.  

A negative film is a photographic film which comprises of inverted colors. Here by inverted color one means that dark colored portion of image appear light in the negative films and light colored portions appear dark.  

Hence, option B is correct

correct answer is a. and d.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.