I believe the correct answer is: material that the lens is
made from.
Lenses are engineered to have
specific focal lengths, besides the curvature of the two sides of a lens. The
focal range, the distance between your optic nerve and the retins in lens, of
the lenses is determined by the material that lenses are made from.
Answer:
He felt protective of his privacy because he knew how avidly his letters would be scrutinized. But he also destroyed so much music because he doubted he was worth the scrutiny
Explanation:
B. they were trades men or merchants of society
Answer:
Painting needed to serve as useful and accurate historical documents, and therefore had to appear realistic.
Explanation:
There may be many reasons for realism in art before photography. One of them is that at that time, probably, artists and society weren't ready for other kinds of artistic exploration. If you think about it, artistic vanguards all came during the 20th century, when the world and humanity were in a different time and context. But before that, and before photography, art wasn't merely focused on the artist's expression and individuality. Artists served royalty and religion, and had the objective of working as a documentation of those times. Michelangelo, for instance, worked for the Medici family. And that's only one example. Kings of all countries had artists painting them, portraying life in castles, parties, births, etc. When photography came along, arts changed completely as it wasn't necessary to use it as a documentation tool.
