Made photogenic drawings with light sensitive paper called photograms. he also developed the negative and positive process, which he called calotype, after the greek kalos typos meaning “beautiful impression.”

changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light-sensitive film" is the one among the following statements about working principle behind a basic still camera is true.

for those of you who searched "which list includes four types of animal-like protists? " and keep getting these results, the answer is c: flagellates, sarcodines, ciliates, parasites